Batman Unlimited: Mechs vs. Mutants is a fun 75-minute timewaster about Batman in a mech fighting extremely beefed-up versions of a few of his arch-enemies.

Mr. Freeze invents a device that super-sizes anything it touches. With the help of The Penguin, Arkham Asylum is broken into and Killer Croc, Bane, Chemo and Clayface are set free to become monsters. As they wreck havoc upon Gotham City, Batman teams up with Robin, Green Arrow, Nightwing and The Flash to save Gotham's citizens, and pilot some mechs along the way.

Bigger does mean better in this case. Watching Batman in a mech get in a fistfight with a lava-spewing Clayface the size of a skyscraper is great fun. None of the action is too memorable, but the guilty pleasure of it all makes it worth it for Batman fans of all ages. The only time some older fans might check their phones is when the action stops and the uninspired dialogue kicks in. It's not eye-roll worthy bad, but it's pretty cliché. Occasionally, somebody has a good line, but they're few and far between.

The film is written by first-time screenwriter Kevin Burke and Ultimate Spider-Man writer and producer Chris Wyatt. The director is Curt Geda, the director of previous direct-to-video Batman adventures Batman Beyond: Return of the Joker and Batman: Mystery of the Batwoman.

The only bonus feature on the DVD is the Batman: The Brave and the Bold episode "Night of the Batmen." It's a random choice, which makes it all the more disappointing that it's the only feature on the disc.

Batman Unlimited: Mechs vs. Mutants is an enjoyable little ride. Even though there's nothing too spectacular to note here, the over-the-top action will bring a smile to anyone looking for something to pass the time.