I really love this movie! I love the voice cast, however I do kind of miss some of the original voices especially Rosario Dawson and Susan Rosenberg for Wonder woman and Kevin Conroy for Batman always my first voice actor choice. I was amazed and excited to know/learn there are other great voice actors/actresses that can fill that spot nicely and did with this movie.
It was interesting to see Superman from a different earth exacting justice, and I'm guessing Joker, Batman, Robin (Damian Wayne) and Nightwing (Dick Grayson) are from Earth 1. (since nothing/their personalities) didn't change other than Robin/Damian joining Superman's Regime.
I love DC's Multiverse and all the different possibilities/storylines, because let's face it after awhile the same old stories become boring, and this one is very good to excellent (action, cinematography, storyline and of course added characters such as Mr. Terrific, Elongated Man, and Catwoman).