Basically it's a long toy commercial
I watched this because DC has been putting out some pretty good animated movies for awhile aimed at the TV-14 and up crowd and they're based on the comics.
This movie on the other hand is based on a toy line, so the material is overly simple and aimed at young children who'd be more interested in Batman's costume changes than the plot. Which is fine, I have nothing against kid movies, I just wish I'd known BEFORE I'd bothered to watch this.
For comic book fans though this is definitely a pass.