Name: Albert Wesker
Here is the Marvel vs Capcom 3 updated roster:
Affiliation: Capcom
First Appearance: Resident Evil


Name: Amaterasu
Affiliation: Capcom
First Appearance: Okami


Name: Captain America
Affiliation: Marvel
First Appearance: Captain America Comics #1


Name: Chris Redfield
Affiliation: Capcom
First Appearance: Resident Evil


Name: Chun-Li
Affiliation: Capcom
First Appearance: Street Fighter II


Name: Dante
Affiliation: Capcom
First Appearance: Devil May Cry


Name: Deadpool
Affiliation: Marvel
First Appearance: The New Mutants #98


Name: Doctor Doom
Affiliation: Marvel
First Appearance: The Fantastic Four #5


Name: Dormammu
Affiliation: Marvel
First Appearance: Strange Tales #126


Name: Felicia
Affiliation: Capcom
First Appearance: Darkstalkers


Name: Hulk
Affiliation: Marvel
First Appearance: The Incredible Hulk #1


Name: Iron Man
Affiliation: Marvel
First Appearance: Tales of Suspense #39


Name: Jill Valentine (DLC Character)
Affiliation: Capcom
First Appearance: Resident Evil


Name: Magneto
Affiliation: Marvel
First Appearance: The X-Men #1


Name: M.O.D.O.K.
Affiliation: Marvel
First Appearance: Tales of Suspense #93


Name: Morrigan Aensland
Affiliation: Capcom
First Appearance: Darkstalkers


Name: Nathan Spencer
Affiliation: Capcom
First Appearance: Bionic Commando


Name: Ryu
Affiliation: Capcom
First Appearance: Street Fighter


Name: She-Hulk
Affiliation: Marvel
First Appearance: The Savage She-Hulk #1


Name: Shuma-Gorath (DLC Character)
Affiliation: Marvel
First Appearance: Marvel Premiere #5


Name: Sir Arthur
Affiliation: Capcom
First Appearance: Ghosts n Goblins


Name: Spider-Man
Affiliation: Marvel
First Appearance: Amazing Fantasy #15


Name: Super-Skrull
Affiliation: Marvel
First Appearance: Fantastic Four #18


Name: Thor
Affiliation: Marvel
First Appearance: Journey Into Mystery #83


Name: Trish
Affiliation: Capcom
First Appearance: Devil May Cry


Name: Tron Bonne
Affiliation: Capcom
First Appearance: Mega Man Legends


Name: Viewtiful Joe
Affiliation: Capcom
First Appearance: Viewtiful Joe


Name: Wolverine
Affiliation: Marvel
First Appearance: The Incredible Hulk #180


Name: X-23
Affiliation: Marvel
First Appearance: NYX #3


Name: Zero
Affiliation: Capcom
First Appearance: Mega Man X