The poster says “from the producers of Underworld” and, if you’re not paying close attention, you might think it’s another sequel in that series, especially since it co-stars (surprise!) Bill Nighy who had a recurring role in the early “Underworld” entries. Unfortunately it lacks Kate Beckinsale and its rudimentary plot is even less coherent: Somehow Frankenstein’s monster has survived to modern times and become embroiled in a war between CGI gargoyles and CGI demons. The latter are under the command of Nighy’s villainous character. Don’t ask, just watch.