Jedah and Gamora confirmed:
Jedah is just perfect. I almost want to buy this game just because of him. Almost.
EDIT: Saving time, I will just quote Count Mario's post with the list that included both Gamora and Jedah (Gamora was a safe bet, but Jedah is too much out of nowhere to be a lucky guess):
@Count:
A new rumored roster leak.
! Arthur
Chris
Chun-Li
Dante
Firebrand
Jedah
Monster Hunter
Morrigan
Nemesis
Ryu
Spencer
Strider Hiryu
X
! Ant-Man
Captain America
Captain Marvel
Doctor Strange
Gamora
Hawkeye
Hulk
Iron Man
Nova
Rocket/Groot (this is how the character was named to me; I’m not sure if it’s just Rocket Raccoon with Groot assists or a redesigned character actually called Rocket/Groot)
Spider-Man
Thanos
Thor
Ultron
! The Capcom side is missing a character, but it’s probably someone like Frank West.
! Venom will come as DLC at some unknown point in time.