It might be because I'm used to previous Batman animated films feeling a little more film-like, but as I was watching this I couldn't help but feel that it was just a long version of a Saturday morning Batman cartoon for kids. The story had too many convenient plot points that just happened to work out, and there were a few too many cheesy on liners and characters saying things like "as if". It wasn't terrible, and had some interesting elements to it, but at the end of the day it's not a Batman animated film I can recommend for the more "mature" viewer. It would be fine for kids though. If I had to find a positive, it would be that the voice acting was well done. Also the animation was decent.
Review of Batman Unlimited: Mechs vs. Mutants
Batman Unlimited: Mechs vs. Mutants
(2016 Video)
Felt like a Saturday morning cartoon
4 September 2016