It was bound to happen, this is probably WB/DC Animations biggest misstep to date. They still have a great track record tough.
Just watch the video, it's pretty sad when the only thing Honest Trailers has to do is just honestly talk about the movie. On really good movies they would normally have to reach for something to make fun of.
Personally, and after reading the graphic novel and then watching the film, I actually like both versions. Granted, the film had that extra opening, but it didn't take anything away from the original story in any way. As far as the animation, well......a little iffy on it but that could be the animators behind it.