Yes, Imu sounds childish.
Itβs almost certain that Blackbeard wants what Rocks wants, which was to become King of the World.
Thatβs where the whole Blackbeard Kingdom plot he has is going (and he may be replacing the new Hero of the Marines with the old one to get it starting)
Whether Rocks knew Imu existed or not is unclear, but it is possible since he βbroke many of the worldβs tabooβs.β
Cobra, incidentally, called Imu the biggest taboo of the world
I think itβs clear that Rocks was at least researching the Void Century, and came close to discovering a lot about it.
Despite the Celestial Dragonβs being scum of the earth, Roger and Garp (two good characters) chose to fight the Rocks Pirates instead of joining them. That says a lot to me.
We can still get Blackbeard the final villain, but I think it needs a timeskip for him to prove himself worse than Imu.
Imu is obviously an atrocious person, totally at home at mass murder, and oversees a corrupt government that allows the elite carte blanche to do what they want. Which is bad. But itβs not all bad. There are good people in the World Government, both as Marines and as kings. There are also peaceful places in the world, and that peace is secured by the Marines.
Final villain Blackbeard would require Blackbeard to prove himself compeltely chaotic evil. I was talking yesterday about Garp protecting the Celestial Dragons. What circumstances could have arisen to make Garp and Roger decide to fight Rocks and not the CDs?
Iβm thinking maybe Rocks were going to do to the Celestial Dragons what people did to Doffyβs family.
Men, woman, children, combatants or not. And if they killed their slaves in the process- oh well, omelettes and eggs.
We would need to see Blackbeard and his crew gatecrash the siege of Mariejois and do this to everyone they find. And not for revenge really, but for fun. He wants to show the world heβs in charge. Get them when they have exhausted themselves fighting the RA and having been sieged in for a while.
Then kill Imu, get the empty throne, and annihilate a few islands of his own.
As king/crazy conqueror abolish the Marines, abolish any laws, abolish all other leaders and team up with Cross Guild. Money for killing any Marines. Worldwide anarchy. Heβd be strong enough individually (having proved it by killing Shanks and Imu) to stand up to anyone, have a powerful crew (killed the Red Hairs, the Gorosei, Holy Knights, all or some of these groups), backing of all the evil pirates in the world (including Cross Guild), an Ancient Weapon to make examples of anyone who opposed him. Imu made an unfair, cruel but stable world, Blackbeard could make a hell on earth.
Then to make things just that little bit worse, heβll do something Iβm absolutely certain heβll do whether heβs the final villain or not- awaken his DF and put the world in eternal darkness. That way Luffy beating him will be here comes the sun (do do do do).
And I think a timeskip would be required for the full effect of a full world of ruin, bring the world to anarchy. What occupies the Strawhats in that time I would not know. Likely a horrible defeat.