Greg Capullo has another teaser shot, though this one is more interesting.
SPOILER-ish thoughts under the cut
No it's not everybody since Steph and Cass are obviously out of the picture. Okay I don't see Alfred either. I don't think this is going actually happen on panel. Well not as something that really happens, I mean this HAS to be a dream, right?
Just the title of the story along hints and that plus Jason is there sans armor just chilling with the others at what appears to be the manor?