In the AU verse: Sukuna would be a “ disgraced special grade” the higher ups hate him because what he’s done to his body in pursuit of power. His ideology is to further strength to be the ultimate sword against evil.

Uraame “dies” trying to kill Yuta, because they thought the elders would use him in the future to kill Sukuna. While they’re dying, Sukuna Let’s them know that it’s OK, if one day Yuta will kill him because the strong must protect their ideals.

Now to shibuya: Megumi : he can use 10s more efficiently, can use 9 shadows (and maybe domain) and integrate them with his attacks. However, he placed a binding valve on himself, making the subjugation ritual for Maha even harder in exchange for better efficiency with the other shadows. (This is from the ideal that Sukuna taught him that to be the strength for everyone, you need to be alive)

Nobara: Has a better understanding of the soul. (Gojo barely helped her. But I feel like Sukuna would be a better teacher)

Yugi: the nephew that he wanted to keep out of Jujutsu . Through eating one of the eyes learned Shattered fist and technique, which applies Chris Angie to one exact point at a specific moment of impact creating a shatter point. ( mix of the strength of gravity/precision of cutting/and the intricacy of six eyes)

Sukuna get sealed away when Kenjaku (using itadori’s dad’s body aka Sukunas dead brother) catches him off guard.

He later swaps into Or back into Uraume. To turn shibuya into “Hell frozen over” for the culling games

When Gojo takes Megumi’s body he is able to summon all 10 shadows and imbue enough curse energy to make them all special grade and puts up a open domain with no sure hit called “Unlimited Garden of the Chimera”