User blog comment:Flamesword300/Overlooked? Ichigos true strength/zanpakuto discussion/@comment-11158196-20130622105348

After dangai, Ichigo's reiatsu was simply OP, that's why Aizen couldn't sense it. That was also his (mostly) fully manifested shinigami powers. I say almost since there was a merge between the hollow and tensa zangetsu but it looked incomplete. The full merge should be a little less chaotic. Proof of zangetsu supressing his power also happened a loooong time ago, when Ichigo drew out zangetsu for the first time, under Urahara training. Jinta noted that zanpakuto looked weir, no handguard or anything, just a big blade. In the meantime, true form of his zanpakuto changed, because he discovered his quincy origins and that's why he gained 2 blades. As he noted, the blade is him, just a piece of his soul in a solid form. And the bankai will be two blades, possibly with the ability to merge into one, since the bigger of two blades has a slice in the middle just large enough for the second blade to slide in and form a handguard for a big bastard sword. The short blade will incorporate some of his quincy powers, like arrows probably, and the large one will be cero/getsuga. Together, he will probably be able to shoot out something like Nigetsu (2 moons) or maybe go a bit less darky and shoot out fiery 二天道 (I think it's written like this :D )