yeah hes probably one of the strongest.

his bankai is probably all modded and stuff with his inventions since he is smarter than mayuri and everything

hacks.

lol basically

yeah, lol, the idea that he hacks his bankai actually makes sense and is pretty plausible... being him and all, i mean his shikai is even pretty absurd seeing as it looks like it can do more things than just about anyone else shikai

Er, all i've seen it do is shoot that lazer pewpew. What else has his Shikai done?

We're also forgetting Ukitake and Kyouraku haven't realeased a bankai.
And with just his shikai Kyouraku defeated #1 Espada, and it has been sort of implied they must be of equal or similar power.

dont think ukitake is alive... but thats another bankai i really want to see for sure.
shunswei's is my most anticipated. especially after what ukitake said about not using it

We don't even know if they will have the opportunity to use them. Unless Unohana comes out saying like "ha ha aizen is noob. He didn't even realize I was healing everybody down there" and they all come back and 100v1 attack Aizen with their bankai.

I think it has been made fairly clear no normal shinigami is going to pose a threat to Aizen as they (all captains etc) are still under his hypnosis.
My (unlikely) prediction is a royal family representative comes and fucks shit up.