Time for some wild speculation! I predict Skullgirls vs Darkstalkers. Why? From Capcom's perspective, it's a safe bet. Lab Zero have proven they can get blood from a stone, producing high quality work for chump change (even if it wasn't their ideal), Mike has demonstrated that he's a hyper-competent and thoughtful FG designer and most importantly, if they reuse assets from Skullgirls that's roughly half the cast already done. It's that bit right there that made me think of this in the first place. Reusing assets is eminent in game development, especially from a publisher's POV. Capcom aren't strangers to outsourcing their IPs, Strider and DmC for example.
I think I read somewhere that Peter hinted that we'd be "getting more Skullgirls, but not in the way you'd expect", or something like that (he said, she said, pinch of salt and all that) which kinda works in this scenario right? Can't verify that bit though.
That's probably not what's gonna happen, but dang it that's my fantasy okay!?
Augh it's gonna be a long couple of days ;_;