I dont thinbk there was a topic about that, so lets discuss here - who would be good enough to take a place of missing captains. And thus, my thoughts about vice captains getting promoted
3rd- Kira would be not really bad for this. He isnt complete idiot, but then again - he's too weak to become one... maybe If he did some more training. Aside from him, we know noone who could take this place.
5th- Hinamori just isnt suited for being captain... bah, she isnt even good enough to be vice captain in the first place,
9th- Shuuhei is a good type to become one - strong (still pwned by Yumichika, but heck...), cool and good looking. If he only gets some more strenght, he would be a good man in good place.
-Isshin - well, he is super strong and probably is ex captain so he wouldnt be bad with it. The only problems are his children - Ichigo wont have problems, since he is adult already, but Karin and Yuzu...
-Urahara - probably the best man to become one, I still dont understand why he hasnt came back. Is it becouse of his shop, Tessai and kids? Or does he wants to be closer to the action?
-Yoruichi - same as Urahara, guess she doesnt want to be one either
-Renji - strenght level enough to become captain, but brain level... still needs to be developed more
-Ikkaku - he refused... too bad
-Ichigo? - I doubt it, maybe later...
-Hanatarou - just kidding with this one ^^