I've written about this almost fun movie before. I really want to like it, but it lacks the one thing that would have made it great- more of Frank vs the Space Monster. It builds up to it, but that final battle is too short and not fulfilling at all.
Having said that, this trailer is pretty great. It sure would make you think you were getting a clash of the titans. There's a lot to like about the movie, but it just falls short of being as fun as it could be.