Superman Unbound is based on Geoff Johns' 2008 Action Comics "Superman: Brainiac" story arc. Braniac invades Earth and its up to Superman to save the world.
DC has had some great animated movies lately, but I always cringe a bit when I see a completely different animation style. But from the looks of this trailer I think the movie turn out great.
Superman Unbound will be released on Blu-ray, DVD and Digital Download later this year.