What I think will happen from Onigashima until the end of the manga. I make my list of all the things that will happen:
1-Kaido and Big Mom will team up against Luffy and his side. During the saga we will have many arrivals in Wa: the crew of Marco (and that remained of Whitebeard's crew, after his death, two years ago; it will certainly also include Jozu and Vista) and Blackbeard (with also Gecko Moria and Uruoge on his side), and Weeble, the self-styled son of Whitebeard. Moria will arrive in Wa before Teach and will help the good alliance; on the contrary, it will also be thanks to his shadows, if Luffy manages to defeat Kaido.
Caribo will also be found to have always been a BB subject; not only that, the latter will inform his lord that Princess Shiraoshi is the Ancestral Weapon Poseidon and we will discover that BB also killed Aokiji previously.
Marco, after refusing to help Luffy's deployment, will change his mind and decide to help him, also bringing his companions.
Weeble, after Marco has abandoned the birthplace of WB, will raze the latter and follow Marco to Wa; also in my opinion, will fight with Jozu.
BB will arrive with the Poigne Griffe stolen from Whole Cake Island and it will be discovered that Katakuri and Cracker have been killed by the Black; not only that, we will discover that the Blacks, somehow, have found a way to read the PCs.
2-At the end of the saga, Kaido and Big Mom will be killed; at that point, BB and his team will take the most interesting fruits.. The fruit of the phoenix will be given to Doc Q, while the fruit of the diamond will be given to Jesus. In addition, he will use Lafitte's powers to hypnotize Law and force him to use the Technique of Immortality on himself; therefore, Law will die and BB will become Eternally Young (but not truly immortal). At this point, the Red will arrive, with his crew, which will put the sticks in the wheels to the Black, thus preventing his crew from eating other fruits and killing other people. So BB, also tired for having fought with Big Mom, not having the strength to fight Shanks too, will have to escape (as he had previously done at Marineford). Now, we will see everything that happened to Reverie: Shanks asking the Five Stars for an alliance against Black, but the latter refuse; Sabo fighting against Ryokigyu, and the four Revolutionary Leaders clashing with Fujitora. In the end, the revolutionaries are saved and taken away by Kuma.
In addition, Jinbe will join the crew.
3-After the defeat of Kaido and Orochi, the new Shogun will become Oden, who will reappear towards the end of the Wa saga and will fight on the side of Luffy.
4-After Wa, Luffy and his team-up will clash with Dragon and the revolutionaries. After meeting, in fact, the two groups will discover they have very different objectives and values, therefore they will clash. At this juncture, we will discover that Uruoge is a spy of Dragon in the ranks of the Blacks and Kuma has regained his consciousness.
Luffy vs Dragon; Zoro with Sabo; Sanji vs Emporio Ivankov; Jinbe vs Uruoge; Franky vs Kuma; Brook vs Karasu; Usop vs Lindbergh; Chopper vs Morley; Nami vs Belo Betty.
5-Later, the crew of the gummy will have to deal with Shanks, probably in Erbaf.
The gummy, in fact, has always said that he would have defeated all the Emperors (including Shanks, therefore), besides he will have some accounts to settle; I remind you that Bartholomew, Luffy's ally, attacked an island of Red, even burning his banner ... an unforgivable thing for the Emperor. I remind you that Kidd lost an arm for having challenged Shanks in the past.
Now, we will also discover that among the allies of Red there are also Crocodile and Bonney; and there is also the possibility that Buggy and Mihawk also became his subordinates.
Luffy vs Shanks; Zoro vs Ben; Sanji vs Lucky Lou; Brook vs Rockstar; Usop vs Yasop, etc.
6-BB will be able to convince Loki, the Prince of Giants, to ally with him, promising him the rarest and strongest fruits of the world; thus earning the strongest country in the world. We will discover that the definitive weapon that Vegapunk was building, which was to replace the Seven, turns out to be a mecha, which Im tries to use with the Black crew; however, he is defeated and forced to return to Marijoa.
7-Later, he will also get a third fruit, which will be a mythological zoan. At the hands of Black and his crew, Garp, Mihawk and Shanks will also die; to be precise, the Falcon will be defeated and killed by Shiryu, and the latter will become the new strongest swordsman in the world. In addition, Impel Down will also be destroyed by the Blacks and, almost all the released prisoners will become his subordinates, including Doflamingo and all his family.
8-To make matters worse, the Blacks will also lay their hands on all three Ancestral Weapons, endangering the whole world. The mugiwara, shortly before the end, will meet Vegapunk, who will reveal to them all the secrets of the fruits
9-The crew of the protagonist will have to deal first with the Navy (Luffy vs Akainu, Zoro vs Fujitora, Sanji vs Kizaru, Jinbe vs Ryokugyu), and then with Blackbeard and his entire fleet (Luffy vs BB, Zoro vs Shiryu, Sanji vs Avalo, Jinbe vs Burgess, Franky vs Vasco, Robin vs Lafitte, Brook vs San Juan, Usop vs Van Oogh, Chopper vs Doc Q, Nami vs Caterina).
Eventually, ours will reach their goals, discover the true story, but Luffy will die soon after. So the Straw Hat crew will split up.
Twenty years later, we will discover that:
-Koby has become Grand Admiral and has the powers of frost frost (those of Aokiji),
-Helmeppo is Admiral,
-Momonosuke became Wa's Shogun
-Kidd is Emperor
The End
You say now what you think will happen.
1-Kaido and Big Mom will team up against Luffy and his side. During the saga we will have many arrivals in Wa: the crew of Marco (and that remained of Whitebeard's crew, after his death, two years ago; it will certainly also include Jozu and Vista) and Blackbeard (with also Gecko Moria and Uruoge on his side), and Weeble, the self-styled son of Whitebeard. Moria will arrive in Wa before Teach and will help the good alliance; on the contrary, it will also be thanks to his shadows, if Luffy manages to defeat Kaido.
Caribo will also be found to have always been a BB subject; not only that, the latter will inform his lord that Princess Shiraoshi is the Ancestral Weapon Poseidon and we will discover that BB also killed Aokiji previously.
Marco, after refusing to help Luffy's deployment, will change his mind and decide to help him, also bringing his companions.
Weeble, after Marco has abandoned the birthplace of WB, will raze the latter and follow Marco to Wa; also in my opinion, will fight with Jozu.
BB will arrive with the Poigne Griffe stolen from Whole Cake Island and it will be discovered that Katakuri and Cracker have been killed by the Black; not only that, we will discover that the Blacks, somehow, have found a way to read the PCs.
2-At the end of the saga, Kaido and Big Mom will be killed; at that point, BB and his team will take the most interesting fruits.. The fruit of the phoenix will be given to Doc Q, while the fruit of the diamond will be given to Jesus. In addition, he will use Lafitte's powers to hypnotize Law and force him to use the Technique of Immortality on himself; therefore, Law will die and BB will become Eternally Young (but not truly immortal). At this point, the Red will arrive, with his crew, which will put the sticks in the wheels to the Black, thus preventing his crew from eating other fruits and killing other people. So BB, also tired for having fought with Big Mom, not having the strength to fight Shanks too, will have to escape (as he had previously done at Marineford). Now, we will see everything that happened to Reverie: Shanks asking the Five Stars for an alliance against Black, but the latter refuse; Sabo fighting against Ryokigyu, and the four Revolutionary Leaders clashing with Fujitora. In the end, the revolutionaries are saved and taken away by Kuma.
In addition, Jinbe will join the crew.
3-After the defeat of Kaido and Orochi, the new Shogun will become Oden, who will reappear towards the end of the Wa saga and will fight on the side of Luffy.
4-After Wa, Luffy and his team-up will clash with Dragon and the revolutionaries. After meeting, in fact, the two groups will discover they have very different objectives and values, therefore they will clash. At this juncture, we will discover that Uruoge is a spy of Dragon in the ranks of the Blacks and Kuma has regained his consciousness.
Luffy vs Dragon; Zoro with Sabo; Sanji vs Emporio Ivankov; Jinbe vs Uruoge; Franky vs Kuma; Brook vs Karasu; Usop vs Lindbergh; Chopper vs Morley; Nami vs Belo Betty.
5-Later, the crew of the gummy will have to deal with Shanks, probably in Erbaf.
The gummy, in fact, has always said that he would have defeated all the Emperors (including Shanks, therefore), besides he will have some accounts to settle; I remind you that Bartholomew, Luffy's ally, attacked an island of Red, even burning his banner ... an unforgivable thing for the Emperor. I remind you that Kidd lost an arm for having challenged Shanks in the past.
Now, we will also discover that among the allies of Red there are also Crocodile and Bonney; and there is also the possibility that Buggy and Mihawk also became his subordinates.
Luffy vs Shanks; Zoro vs Ben; Sanji vs Lucky Lou; Brook vs Rockstar; Usop vs Yasop, etc.
6-BB will be able to convince Loki, the Prince of Giants, to ally with him, promising him the rarest and strongest fruits of the world; thus earning the strongest country in the world. We will discover that the definitive weapon that Vegapunk was building, which was to replace the Seven, turns out to be a mecha, which Im tries to use with the Black crew; however, he is defeated and forced to return to Marijoa.
7-Later, he will also get a third fruit, which will be a mythological zoan. At the hands of Black and his crew, Garp, Mihawk and Shanks will also die; to be precise, the Falcon will be defeated and killed by Shiryu, and the latter will become the new strongest swordsman in the world. In addition, Impel Down will also be destroyed by the Blacks and, almost all the released prisoners will become his subordinates, including Doflamingo and all his family.
8-To make matters worse, the Blacks will also lay their hands on all three Ancestral Weapons, endangering the whole world. The mugiwara, shortly before the end, will meet Vegapunk, who will reveal to them all the secrets of the fruits
9-The crew of the protagonist will have to deal first with the Navy (Luffy vs Akainu, Zoro vs Fujitora, Sanji vs Kizaru, Jinbe vs Ryokugyu), and then with Blackbeard and his entire fleet (Luffy vs BB, Zoro vs Shiryu, Sanji vs Avalo, Jinbe vs Burgess, Franky vs Vasco, Robin vs Lafitte, Brook vs San Juan, Usop vs Van Oogh, Chopper vs Doc Q, Nami vs Caterina).
Eventually, ours will reach their goals, discover the true story, but Luffy will die soon after. So the Straw Hat crew will split up.
Twenty years later, we will discover that:
-Koby has become Grand Admiral and has the powers of frost frost (those of Aokiji),
-Helmeppo is Admiral,
-Momonosuke became Wa's Shogun
-Kidd is Emperor
The End
You say now what you think will happen.