Except for Isane switched out for Matsumoto, I guess.
It sounds like Aizen is leaving his remaining Espada behind to continue guarding the princess in the castle... In which case he'll be horribly outnumbered at Karakura.
Well, if his goal is to just DESTROY Karakura, I guess he could bring a horde of grunt Hollows to help.
Or he could send the grunts to Soul Society. Seriously, NOBODY (of note) is guarding Soul Society right now?