[Snowflakian]

I've seen them all so far.

Personally my favorites are Planet Hulk, Hulk vs Wolverine, Dr. Strange and batman under the red hood.

The rest have been pretty good, but each have something that bugs me a little.
For All Star Superman, it's the high gravity accelerates time finale they do... (Comic book science, yes I know, but real science says high gravity slows time.)

I can't really pick one as marvel vs DC. They are about equal honestly. I may change my tune come emerald knights though.