User blog comment:Xilinoc/Ch. 546 - THE LAST 9DAYS/@comment-6657474-20130717232756/@comment-11051098-20130718212156

No one knows. The last time we saw them, Komamura was in this cave to see his grandfather. Súi-Feng took body lifts upside down on a cliff somewhere. Kensei forced Shûhei to use his Bankai or get killed by Mashiro.

Komamura and Súi-Feng at least appeared to be outside the Seireitei, somewhere in Rukongai. I would assume that Kensei, Mashiro and Shûhei are too. Ômaeda was shown to be at his family's mansion, I don't know if that's located inside or outside the Seireitei.

So in the worst case, if the Seireitei really have been switched with the Vandenreich, there's only the 6 of them left to fight, unless the Royal Guard can land the Tenchûren outside the Seireitei, if they come to fight as well.