From his first movie, Above the Law (aka Nico), Steven Seagal has always been the star of his movies (with the exception of Executive Decision where he had a cameo). "Against the Dark" breaks the trend. It's not really a "Steven Seagal movie" but rather an average B-grade post-apocalyptic zombie movie featuring Steven Seagal, in a heroic role of course, but with limited screen time.
Those hoping for an action movie with Seagal as the star may be disappointed, but taken for what it is, a postapocalyptic horror movie, I think it works pretty well, and Seagal is a bonus. There are worse ways to spend an hour and a half.