So basically in this chapter:
1) "Twlight"-like plotline.
2) Urahara one ups Aizen again Or so he thought.
3) Dat (Human + Shinigami) * (Hollow + Quincy) Babymaking.
4) Unohana & Shunsui (as well as Gotei 13) were either mistaken about Isshin's "death" or told by old man Yama to keep his disappearance secret and identified as a combat loss.
5) Ryuken receives the ultimate cockblocks and instead becomes a lonely doctor over the years.
6) More than one way to reverse Hollowfication.
7)
We see this again.