It's rated PG-13, as was its predecessor, but it's full of gore and pain and trauma...A worthy finale.
Rob Gonsalves — eFilmCritic.com
A fully-realized achievement that does right by fans of the source material and is the new standard of excellence for Warner animated films.
Jeffrey Lyles — Lyles' Movie Files
It sets a standard that few can beat.
Rob Vaux — Sci-Fi Movie Page