This is a great trailer. I'm not denying that.
An interesting plot revolving around hockey, lots of complicated action scenes, detailed frame by frame animation, sort of a blend between anime-esque proportions and the stylization of Western comic books. I can't imagine being able to make something like that in my lifetime.
However, I don't like how the way mouths are drawn. They may look too big, or placed lower compared to their eyes and nose (the noses themselves are rather big, which sometimes make their faces look derpy, although the 3 guys in 0:45 look fine.
IMO some of the special effects used throughout the trailer seem overdone, if not unnecessary. For example: the screens at 0:11, 0:26 and 1:37 drive my attention away from the character(s) and the text, while the dot pattern oftentimes looks filtered over the background rather than integrated into the art-style.
Although Impact is a good, I feel like you could use other fonts as well.
Overall, a lot of great potential, though there's still a few flaws to iron out. Can't wait for the full thing to come out.