[Snowflakian]

Personally I'd pick:

Wave 5: (Cosmic)
Nova Prime
Starlord
Quasar (new)
Spider-Man (Captain Universe)
Rom the Space Knight

Wave 6: (Avengers/ForceWorks)
Scarlet Witch (Force works short hair)
Century
US Agent (Force works)
Mandarin (Hands of the mandarin version)
Ironman (Modular, based on the IM season 2 design)

Wave 7: (Changing Directions)
Vance Astro
Spider-Man (Future Foundation)
Venom (New paramilitary one)
Ghost Rider (Daniel Ketch Cyberpunk version)
Songbird

Wave 8: (Of Gods and Men)
Storm (in asgardian storm bringer costume with hammer)
Ironman (Thor buster armor)
Doctor Strange (Trenchcoat version like the animated movie)
Ares
Thunderstrike

Wave 9: (Nothing is what it seems)
Mockingbird (modern)
Horseman Gambit
Anti-Venom
A-Bomb (Rick Jones)
Rescue

Wave 10: (Keeping Secrets)
Uncanny X-Force Archangel (different than the exclusive one)
Modern X-Force Wolfsbane (wolfed out)
Max Fury (Nick Fury clone)
Secret Avengers Beast
Nova armor Commander Rogers

Wave 11: (Training Sessions)
Emma Frost
Rockslide
Pixie
Astonishing/Avengers Wolverine
Anole

Wave 12: (New X-Men)
X-23 (academy X)
Hellion (Hellions)
Forge
Bastion
Surge

Wave 13: (Testing the water or the "It'll never happen" wave)
Prodigy (Slingers, but alt peter parker one)
Lady Hydra
X-23 (Captain Universe)
Kimura
Ricochet (Slingers, but the alt Peter Parker one)

I'd like to see a variant unmasked X-Force outfit X-23 in the cases too.
My list also slightly cheated, using X-23 in place of wolverine in spots, Rescue in place of Ironman in spots, and slingers in place of spider-man. In fact, with Slingers you can have an entire wave of spider-man, and no one would probably bat an eye at it.