I really like Justice League adventures, since they espouse the spirit of cooperation among the DC superheroes which I grew up with. My favorite DC comics in my childhood were my JLA comics. I really liked the recent revival of the JLA on TV. And now, I welcome these new mature animated JLA movies.
Crisis on Two Earths is exactly what the title tells us. There are two Earths in this movie. This Earth where the JLA lives in, and a parallel Earth where the characters are reversed. The JLA counterparts are part of the nefarious Crime Syndicate (Ultraman, Owlman, Superwoman, Johnny Quick Man and Power Ring), while Lex Luthor and the Joker are the self-sacrificing heroes.
It is very good to see the various guest appearances of other superheroes in this movie, like the Black Canary, Aquaman, as well as evil analogues of Green Arrow (in red) and the Elongated Man. It is good to see my favorite character, the Martian Manhunter, also have a featured part, and even a love interest!
As with several other JLA adventures, the Batman had the meatiest part, together with his alter-ego, Owlman. Toward the end, the future of the two Earths actually lay in their philosophical and physical entanglements. This scene, as well as the rest of this movie, was very well-written and set into animation. The voice acting was sensitive and very well-done.
