Song to listen to while reading this chapter: http://www.youtube.com/watch?v=6_Y3zbRxZ6Q
First off: Oh. My god.
Now that that's out of the way, let's get to the actual review.
So Bambietta is, contrary to popular belief, "The Explode". I find it interesting that Kubo chose to use the verb instead of the noun here, but it makes sense given her ability: her Reishi turns objects into bombs. I also like that Momo showed up and tried to attack Bambietta because of Shinji being taken down. Speaking of which, he looked pretty badly burnt by being exploded.
Now for the "oh my god" moment of the chapter: the members of Komamura's clan were originally humans, and thus they can momentarily return to their human form by removing chains or something. I don't know HOW you guys predicted that Komamura was a human under that armor, but you did (inb4 "I'm a real boy now!"). And on top of all that - on TOP of Komamura becoming human - his Bankai has a new form, which I'm digging quite a bit, since it seems to be an unarmored form of his regular Bankai. Very fitting, since he has cast aside his armor. Also, love that quote about ripping out his own heart to help the Shinigami.
Anyhow, that's the chapter in a nutshell. Though there were some mixed opinions about 555, I think we can all agree there's some awesome stuff in 556.