Batmonkey Gundam. That's it. That's all you need to know. I've never laughed so hard at a movie in a long time, and the sad part is, this wasn't mean to be a comedy.
Did you love the suspense and intrigue of the Long Halloween? Too bad! How about the machinations of Bruce Wayne's psyche as he balances his brains with his sacrifices? Nada!
Instead, see Batman fight Joker and Harley in their Team Rocket era, and wonder how feudal Japan was able to manufacture enough steel to make FIVE different Gundam style castles and provide a magical flute capable of summoning monkeys so well, it would make the Wicked Witch of the West jealous!
What's honestly the saddest part is that the animation is stunning, and the premise of the plotline could have been great, but instead, we are given a stereotypical view of Japanese animation in the forms of Gundam Dragon Ball Z style fighting and awful quips that include Joker taking a nap. For no reason.