Yah thats a good point, it was a pretty good parody of comics. Not sure that was the intent behind the movie, and it wasn't what I wanted out of the movie, but I hadn't looked at it that way. The big stupid titles, the way Starro got killed, all of the over-the-top meaningless violence, the fat jokes, the pointless characters who seem to just be there for effect. Yah.
Except for the Harley Quinn part, that was an odd little mini-movie within the movie.