@oldnightcrawler: I'm realizing I phrased my post super wrong :P I meant. How can he consider characters like Monica just a second wave character when she was a big part of the avengers for years.
I think if he said Nextwave characters, specifically, he was probably talking about the characters from this book:
Monica was the leader of this team, and I'm guessing he just prefers this version of the character enough to not revert her back to her more traditional superhero ways. Which is a bit of a shame, because this is the version of the character I'd be most interested in seeing interact with the Avengers.