Over the years, there’s been a lot of bad movies based on good video games. And some of the worst have been animated. But Batman: Assault On Arkham — which Warner Home Video has released as a Blu-ray/DVD combo pack, on DVD, and digitally — bucks this trend by not only being a great ’toon based on a game, but by also being a great animated movie for Batman fans who don’t play the games that inspired it.