[Boy Blunder]

Given the timing, I'd love to see a wave devoted to the 20th anniversary of one of Marvel's more fondly-remembered events:

Age of Apocalypse
BAF: Ol' Blue Lips himself, Apocalypse, in his AoA armor and cape.
Magneto (either removable helmet or swappable heads)
Blink
Sabretooth (while I'd love to include Wild Child, that might be too much to include given the BAF part)
Love and War: Weapon X/Jean Grey
Horsemen of Apocalypse: Dark Beast/Sinister

Walgreen's Exclusive: Rogue

(Of course, this is only a fraction of the figures I'd love to include in this wave, but I think this is a decent cross-section of tentpole characters from the story.)

Only other one off the top of my head is also a 90s X-Men story, with a few more obscure characters than one would expect, I suppose.

Operation: Zero Tolerance
BAF: Maggott w/ Eeny and Meany (powered-up blue form)
Iceman
Zero Tolerance Forces: Bastion/Prime Sentinel (Generic?)
Unlikely Allies: Cecilia Reyes/Marrow
Hope for Mutantkind: Professor X/Cable

Walgreen's Exclusive: Joseph (I know he didn't really play much of a role in OZT, but how else ya gonna get him on the selves? A Trial of Gambit or Magneto War line?)

Obviously, both are pretty far-fetched, but in a perfect world, maybe...