You see the title of this movie. "Superman-Batman: Apocalypse". You think, "oh, they're going to fight each other". You wish.
The title is misleading, and that is just the start of the problems. The movie is actually a vehicle to reintroduce Supergirl (Summer Glau) to the DCAU. Based on a comic book story drawn by Michael Turner and written by Jeph "Ear" Loeb, who these days works for Marvel, Kara Zor-El draws the attention of Darkseid (Andre Braugher), who needs a new captain for his elite guard, the Furies. I'm not on board with Granny Goodness having more of a masculine voice (in this case, Edward Asner, reprising from Superman: The Animated Series). Like, wasn't Roseanne Barr available?
Superman (Tim Daly) has his work cut out for him. Not only does he have to teach Kara Earth culture, he also has to deal with his closest JLA allies, Batman (Kevin Conroy) and Wonder Woman (Susan Eisenberg), the latter of whom decides that Kara should train on Themyscira. That doesn't end well. Kara winds up on Apokolips and is brainwashed by Darkseid.
In all, the movie is just tiresome. I didn't read the original story, and it's just as well.
Here's the trailer: