We talked about this a bit in the FGW thread a few days ago, but CAS has been continually rejected as Capcom USA has been pushing for it from years.Gotta be Capcom All-Stars. Right? There's no way it's just Rival Schools or Power Stone, though it totally should be, and they're probably still mulling over what to do with Darkstalkers; I wouldn't be surprised if they've got a prototype of that.
It's also too big of a project I think for any dev team to be working on if a year ago they had no new fighting games in development allegedly. Also, the producer that talked about fighting games in 2014 was the head of their mobile initiative (Development Studio #2). Ayano had nothing to say.
It's unlikely it's a big project. And they have said HDMakes have been less and less profitable.. it's likely a smaller project or resurrected IP.