I'd like to believe it since I'm theorizing that the DLC characters will be returning characters, because Capcom wanted to focus 3 on introducing a new cast, and now that they've done that, they might as well bring back some oldies.
Even though there is only one set of DLC to prove this, Jill/Shuma could be a trend setter. Both are returning characters [albeit Jill is completely different, but it's still Jill]
But this is just me rambling =/