Capcom is investigating ways of bringing Tatsunoko vs. Capcom: Cross Generation of Heroes to the states, says Capcom VP Christian (Sven) Svensson. Here's a quote from the Unity message boards:
Not determined yet (the U.S.A. release). There are a lot of licensing issues around the title given that those properties are held by different companies across the West and they vary by territory greatly. It was created as a Japan-only project but we're investigating.
We're hoping to use a couple of the arcade cabinets at Comic-con for at least SOME portion of the time to show it off (mostly they'll be dedicated to SFIV, but we'll steal a couple hours a day for TvC).
No promises, but that's what we're pushing for.