User blog comment:Godisme/Deicide 20/@comment-1583427-20100902051624/@comment-1268838-20100902124931

Not necessarily true. Sui-Feng (gotta get used to that Dx) and Tousen have shown us that Bankai can follow the same theme as the Shikai, without actually being an expansion of its powers. The thing is, Aizen's Shikai is so powerful already that it's hard to imagine just what his Bankai could possibly do. I have a hunch that it will be reality-warping, but Kubo will just end up surprising me as usual.