Ok so here is my theory : sukunas last finger is nowhere to be found right? So what if Kenjaku, when he made the death paintings back in the day, made juji out of that finger? What if he’s the only one who’s able to surpress sukuna is because he’s in fact his physical incarnation? So yuji will be the only one to be able to beat sukuna in the end. I guess he’s gonna unlock some hidden abilities, soon.
Well that’s my theory
Your theory for me seems to be kinda right but... I think it was said that Gojo had his last finger... but this issue was not mantioned anymore so... I dunno, we'll see what will happen ヾ(☆▽☆)
Idc about anything else just what’s going on with itadori