Tatsunoko vs. Capcom getting four new characters

GameSpot sends word that Tatsunoko vs. Capcom will pick up four shady-looking characters during its road trip to the West. Fortunately, it just so happens that all of these characters are proficient fighters, so they'll be in the game! Hooray!

Sadly, Capcom stopped just short of saying who the new characters are. All we know is that Phoenix Wright will not be one of them.

So, any guesses on who the fiersome foursome might be?