Oh god, video game based movies are destined to be bad, it's kinda of like, if movies had DNA, then it would be in their DNA to be bad. It will suck, just look at Mortal Kombat, Street Fighter, Tomb Raider, Resident Evil, all terrible movies to say the least.
But since I really like the game Tekken, especially Tekken 5, I will go to see it but I won't hold out much hope. Video game based movies have a bad reputation, epsecially where Paul Anderson is concerned, gosh he's a sucky director and writer.
I actually though Final Fantasy was OK, but it got mixed reviews from the critics. I'd say it's the best video game based movie available, all the rest suck.