A new era in the DCAU. Glad to see the animation department still sticking to the stories and delivering their best to the fans. The new animation style might upset hardcore fans of the New 52 animated universe, but it's unique and might be even better in its own way. Primarily focused on the Flash, and filled with fresh and witty dialogues, Justice Society : WW II is definitely in my top 10 DC animated movies. You get to see characters like Hourman, Hawkman, Black Canary, and yes, the Jay Garrick! In short : definite must watch for DC fans, (it does hint at setting up something bigger).
EDIT : People in the reviews here have no idea that JL and JSA are different, please do your homework before you get aboard the hate train.