If Konami was ever to make another fighting game, they NEED to outsource it to someone who knows what they're doing. Or they could just pick up the pieces that were left out of Soul Calibur 5. It would most likely make a better game than what the IGA team is capable of.
Or give it to Capcom. They could make a VS. game... Castlevania vs. Ghosts'n Goblins. Or maybe not that. There aren't that many characters in the G'n'G universe. But Castlevania vs. Mega Man? Or not. But what what about Castlevania vs. Devil May Cry? Nah. Damnit. The Castlevania universe is so effin LARGE that no Capcom game could fit, except Mega Man, but that would look very awkward.
EDIT: Capcom vs. Konami would be rather epic, btw.