Soul Calibur X Square Enix
I dunno if SE would be on board for that, sure. Everyone loves money, but look at how SE teases FF7 fans about Remaking FF7. And that would rake in mad dollars.
Got a better shot of seeing Capcom characters in SCV, if they take the guest character route...Which really IMO needs to be dropped. Calibur can stand on its own legs, for people who want such fan characters. Character creation and character edit is right there.