I think any video game made into a movie should be animated. It's too difficult to use real time, at least for fighting games that is. Tomb Raider and The Prince of Persia were decent though. Maybe cuz there's not so many characters to "bring to life" in those films making it easier. You guys remember Street Fighter with Van Damme? Man that shit was a bust, LOL! I remember being a kid and thinking "This shit is COOOOOL!" Now it's like "This shit is garbage!", lol.
But if the story of Tekken is grasped well from its producers like Square-Enix did with Final Fantasy Vll: Advent Children, then it should be a success.