I know this is extraordinarily optimistic, but I think this looks pretty cool.  The first "Resident Evil" movie was decent, but I thought the second one was an absolute waste.  I'm not sure what "Extinction" is about, but from the trailer, it looks like it has some big set pieces in a post-Apocalyptic Las Vegas.  It's getting more and more difficult to gauge a movie's quality from the trailer, because the art of the trailer is getting better and better.  For instance, the 300 trailer is one of the best trailers I've seen in a long time, but I'm not convinced the movie will be as good.  There are several films out there where I've enjoyed the trailers more than the movie.  Whether it be the music accompaniment or the editing, sometimes stories work better as trailers.

So, the trailer for "Resident Evil: Extinction" is good.  I have no idea about the movie.