Yeah I don't think the royal guard are going to be a bunch of yama-jis on steroids running around raping stuff all day. I would think that they are on average more on the level of say Byakuya or Shunsui, and prolly only replace members as needed, meaning that it could be possible for any current "elite" captain to be chosen if necessary.
Inside Ichigo! All hail king Hichigo!
Squad Zero is Ichigo's parents.
We really don't know the size of squad zero.
Just because it consists of former captains doesn't mean they are all still alive in it, could just mean traditionally. Also does not mean all or even a lot of captains get promoted.
But, maybe Hichigo and Zangetsu are the first line of defense and the other members are somewhere else.
I mean, there are plenty of interesting things I would like to get to know better, most obvious is Isshin/Ryuken, who they are and their relationship to each other. Matsumoto's and Gin's possible love relationship, how will that effect the end? Tatsuki's and Karin's new ability to actually see souls; this obviously can have interesting effects on their relationship with Ichigo. Hey, even such a character as Keigo can be interesting to explore in this regard. Plenty of good stuff UP THERE, so no, the least thing I want now is more characters introduced (obviously baddies have to be though).
Avatar and signature by me.
Yeah I agree...kill off Chad(cuz kubo hates mexicans anyways), fat Orihime with her hax skills, Renji(just for dramatic effect), Ukitake(because he is sickly and will prolly die anyway), Yama-ji and his no name lackey(so ther can be a new CC), keep Hiyori dead, and by all means keep the dead espadas dead. I think this would free up a considerable amount of plot space occupied by useless and boring side stories for some introduction of new supporting characters with new storylines.