Late to the game on this one, but I'd be down for a Champions wave. It would allow us to get a bunch of new characters, but also add in a couple of redos that people might like. Here's what I'm thinking:
Totally Awesome Hulk (I'm not feeling his new identity, so I'd pull for this one)/updated Ironheart (though not sure anyone really is clamoring for this)
Ms. Marvel (I think people would like a comic version, even though I think the animated one works just fine)/young Cyclops
Miles Spiderman/Viv Vision (she's the real reason I want this set)
Unstoppable Wasp/pick any of the other characters who've joined for a bit of time (I just realized I have to rush out the door and forgot my 8th pick)
And, the best part, a BAF Sparky the dog!