TSSZ News is reporting that Nintendo has confirmed at a recent press event in Spain that the game no one (relatively speaking) thought had any chance of leaving Japan is doing just that. As seen in the picture at right (click to enlarge), Project X Zone-- the crossover title featuring characters from SEGA, Namco Bandai, and Capcom, including X, Zero, Iris, Vile, and Tron Bonne-- is slated for a European release in 2013. While no other details were given, this seems to make it that much more likely a North American release is also in the cards. And if it isn't, at least it will have some form of localization for those bold enough to purchase a European Nintendo 3DS to play the game as an import.
Edit: After WilyNumber13's comment, marking this as a rumor might be the safer bet. However, it's one we're inclined to believe at the moment.
Source: Vicio Juegos, TSSZ News