One thing I can say about Let's Watch Milla Jovovich, or as it's also known, Resident Evil: Extinction, the makers knew what looked good in front of the camera, and that was mostly Milla. As a friend watching with me said, "It's the kind of movie that you can enjoy if all you care about is visuals." And visuals are what you get, with about 50% of them featuring Milla naked or nearly so. (OK, maybe not that much, but after a while you start to wonder just how narcissistic she is.) Milla is returning in the role of Alice, of course, and there are a few other returning characters as well: Carlos (Oded Fehr) and L. J. (Mike Epps). A few new faces are added in, namely Claire (Ali Larter), the leader of a band of struggling survivors. But everyone other than Alice really doesn't matter. There's a scene in the movie where Alice is standing with a firestorm swirling over her head, and that captures the rest of the movie perfectly. Alice is the centerpiece, looking good and kicking ass, and everything else—supporting cast, plot, dialog—is so much flame and shadow.
In the film, the T-virus has spread throughout the world and affected almost all living organisms, turning everything into desert. The Umbrella Corporation is still lurking underground, trying to find an antidote and also trying to locate Alice, whose blood holds the key. The survivors on the surface are just scraping by. Alice is traveling alone, but runs into a band of travelers including some of her old friends. Sprinkle in various zombie attacks, and that's the film. This plot may sound plausible on the surface, but I found that once I started watching the movie, the details got more and more ridiculous. Paul W. S. Anderson returns to write this third installment, and apparently he hasn't learned any more about science or common sense. If you're one of those people that can't stop your brain from asking questions during a movie, you're probably going to spend a lot of time either laughing at the writing or rolling your eyes.
This may be exactly the kind of movie you're looking for: either something fast-paced, nice to look at, and easy to follow, or something immensely silly that you can make fun of later. But if you want gripping action or eerie horror, best to look elsewhere.