Not much I didn't know beyond how deep the scope of IP went. I was surprised by the lack of someone reading the Daily Bugle about the Mutant Menace. Then again, I'm amazed no one dropped the name Pym or Cage. And in fairness, it's not like crossover is a physical impossibilty, just that the studios can't or won't negotiate and play nice with each other long enough to do so.
On future Avengers and crossovers, well, I suppose the most obvious ones will come from the spin off movies: She Hulk, Falcon, Hercules or Beta Ray Bill, then add new stuff of Doc Stange, Ant Man et al. But since they're doing Thanos, while Warlock is the obvious choice, the first on to stop his universal destruction was Captain Marvel: an honerary Avenger and probably a better fit with easier to deal with baggage (and gives us Ms. Marvel) so I say go that route.
And I do have renewed hope for that Runaways movie.