Actually, if I remember correctly, they've already made a Tekken Anime movie. I haven't had a chance to see it jet, but I've seen the case a few times.
I think it might just turn out to earn them a few bucks. I don't really play it either, but one game I do regularly play is right next to Tekken 5; Dark resurection, & that gets play quite a bit. Plus now they have Tekken 6 out, there's more interest in a possible movie.