Justice League: The Flashpoint Paradox
Wow. This awesome movie, featuring Flash Gordon, is amazing. I haven't read the comics it's based off of (although I did just watch the Justice League DCAU episodes that feature a somewhat similar concept, but totally different *everything* else).
Time and time again, Warner Bros. knows how to make a great animated DC movie.
It's not perfect, and there are a few issues with the storyline (like, what was really the point of the entire Superman subplot. Oh, and Barry, you probably shouldn't call him "Clark"... why the heck would he have that name in this timeline?), but seeing Cyborg kick some ass again (FYI: Justice League: DOOM is awesome as well) was a plus. The Batman reveal was handled nicely... The hinting of The Joker lit up every happy part of my brain... second/third tier heroes and villains making minor cameo appearances was spiffy (although the Kaldur'ahm version of Aqualad made me sad for no Young Justice).
Overall, fun movie.