It seems like the story is progressing to Elbaf. For the SHs going there, the path seems relatively simple.
The WG is hunting Vegapunk, the SHs are trying to save him, Saul is on elbaf. The SHs go to elbaf in order to bring Vegapunk to Saul(and possibly to dragon), so that Vegapunk can be safe under the protection of the giants.
But what about Blackbeard? Why would Blackbeard go to Elbaf? If I were to guess, maybe it will be something due to Kid. Despite being a key player, we are yet to receive an update of what Kid did since leaving wano. We know he is searching for saul, meaning he will probably end up in elbaf.
So, what if Oda uses Kid to bring Teach to elbaf? My guess is that he raids Hachinosu while Teach is fighting Law, steals a bunch of Teach's weapons/gold via magnetism, and then heads off to elbaf. Teach is enraged, he follows Kid to elbaf in order to kill him. This is where Luffy and Teach meet and battle it out.
The WG is hunting Vegapunk, the SHs are trying to save him, Saul is on elbaf. The SHs go to elbaf in order to bring Vegapunk to Saul(and possibly to dragon), so that Vegapunk can be safe under the protection of the giants.
But what about Blackbeard? Why would Blackbeard go to Elbaf? If I were to guess, maybe it will be something due to Kid. Despite being a key player, we are yet to receive an update of what Kid did since leaving wano. We know he is searching for saul, meaning he will probably end up in elbaf.
So, what if Oda uses Kid to bring Teach to elbaf? My guess is that he raids Hachinosu while Teach is fighting Law, steals a bunch of Teach's weapons/gold via magnetism, and then heads off to elbaf. Teach is enraged, he follows Kid to elbaf in order to kill him. This is where Luffy and Teach meet and battle it out.