Just got around to watching this movie. It borrows many designs from JLU, and even brings back the old cast (Conroy, Newbern, Eisenberg, etc.). However, it doesn't really feel like it's in continuity with JLU and the rest of the DCAU in the sense that there are no callbacks to Supergirl's joining the Legion, no references to the Legion's first appearance in the DCAU (meeting teenage Clark Kent in Smallville), and I think they changed some of the designs of the Legion members (though Emerald Empress looks similar).

Anyone else see this? As for me, I'm a bit disappointed in the lack of Superfamily connection to the Legion. Also, it kind of follows the formula of a lot of recent Justice League movies: the team can't really do much to save the day, so the movie's main characters have to step up, which I'm not too fond of.

Overall, it felt like a 4-part JLU episode: interesting, but not necessarily something I'd be happy to have paid $20 for.