Just a couple plot related thoughts to chuck out there that may have been overlooked in light of the whole Isshin Shiba thingy.
Who do you reckon would take over as Eighth Division Captain since Shunsui got "Promoted" to Head Captain, Love Aikawa? Isshin? Or someone completely new and unheard of? Or maybe a Leiutenant (E.g. Renji)?
Also, what do you think Oshō and Senjumaru Shutara invented for Soul Society? I personally think that Senjumaru invented the Senkaimon, as "she simply placed her hands on its door and it opened by itself." Maybe that could be foreshadowing the Senkaimon? Or it could be the Shutara Scale referred to by the 12 Division members in Chapter 480.