I think there are a few things in the movie that are not answered in the serials. I can think of one offhand. It is how Strakk (spelling ) got banished. There should be others too.
I saw it, so put down the shotgun. I thought it was good. It was a little better than the first, but it was not my favorite super hero movie. (It doesn't beat Spider-Man 2. That movie was great!)