Kid Buu is the purest and original form of the entity known as Majin Buu, with the fat and childlike version that became friends with Hercule being the result of Kid Buu's absorption of the Grand ...

this could bring the Majins literally together to form a creature that’s more like the original Majin Buu. But even if that’s the case, that would mean they’re still not the final villain ...

As Akira Toriyama drew Dragon Ball after the Cell Games, he did not want to introduce a new villain in the form of Majin Buu.

named Majin Kuu. Created by Dr. Arinsu and the Great Witch Marba, Kuu rises from his cauldron obedient to his new masters, and seems to be much more controllable than the original, chaotic Buu.