Guys I've just had a bad thought.
What if there is no wolfpack? What if there are only 4ish lone wolves sprinkled throughout the game? I was pondering mechanics, and most of the Marvel villains don't really team up. It's typically a Big Bad and then some lesser goons. So, it sort of stands to reason that they wouldn't be in a cohesive group in this game. I mean, I'm having a hard time imagining a pack of, like, Kaecilius, Thanos, Mysterio, and Ultron.
Maybe I'm tinfoiling too hard, but with Mel's flip I feel like it isn't something we can rule out.