I sorta hope that Kubo will somehow go to a flashback to whatever happened after the battle, but with the limited amount of pages he has for this final chapter, I don't really see it happening unless he takes up like the entire issue of Jump.
But Rukia being captain was great! Honestly if there was a chapter before it completely ending the battle, this chapter wouldn't have been that bad, but jumping from the battle to this was too sudden.
It's so sad that the series is getting rushed while other series which don't need it get to have such a long time to develop their stories.
Another thing I don't enjoy is the fact that Ichigo's bankai was so hyped up then it kinda fell flat, especially with this 10 year time skip. We didn't even get to see Ichigo celebrate his victory ;-;
Like others have said, I hope the announcement is an anime adaptation and some of these plot holes will get filled in. I honestly don't know what else this announcement could be besides an adaptation or a sequel manga of some sorts. They wasted a whole page to write it in big letters so if it's neither of those things I will be pissed.