So, looking at the Marvel Legends revealed at SDCC (most of which are on the way next year I believe):
Marvel Legends Avengers Wave 1 - Odin/King Thor Build a Figure
Scarlet Witch
Machine Man
Hawkeye/Iron Fist (running change)
Captain Marvel
Thor
Sentry
Marvel Legends Avengers Wave 2 - Thanos Build a Figure
Spider-Woman
Hellcat
Marvel Legends Spider-Man - Hobgoblin Build a Figure
Comic Spider-Man
Spider-Girl
Spider-Man 2099
Other Legends (Exclusives, Retailer Unknown)
SHIELD Movie 3 Pack (Agent Coulson, Agent Hill, Nick Fury)
Guardians Comic 5 Pack - 2015 (Star-Lord, Rocket, Groot, Gamora, Drax)
Target 3 Pack (Ultimate Cap, Ms. Marvel, Radioactive Man)