This. Someone's got to have a duplication/multiform bankai.Kenpachi's bankai will summon another Kenpachi.
Won't they just start fighting each other to see who's the strongest?Kenpachi's bankai will summon another Kenpachi.
That's my theory as well. He will use his bankai to save the day or whatever.I'm thinking Aizen is going to loki it up and help Seireitei.