The guy with the Mega Man avatar leaves Mega Man off of his list
My Marvel vs Capcom roster, I went with 13 per side and two secret characters for each side:
Marvel:
1) Spider-Man
2) Green Goblin (Gotta have a Spidey villain, Venom sucks, Doc Ock's arms would complicate things too much, and Goblin's glider could make for a cool character).
3) Iron Man
4) Captain America
5) Thor
6) Hulk
7) Wolverine
8) Storm
9) Magneto
10) The Thing
11) Invisible Woman
12) Daredevil
13) Dr. Doom
Capcom (sorted by franchise):
Street Fighter:
1) Ryu
2) Chun Li
3) M. Bison
Mega Man:
4) Mega Man
5) Dr. Wily
Final Fight:
6) Mike Haggar
Ghouls 'n Ghosts:
7) Arthur
Resident Evil:
8) Leon Kennedy
9) Wesker
Dino Crisis:
10) Regina
Viewtiful Joe:
11) Joe
Devil May Cry:
12) Dante
Breath of Fire:
13) Ryu
Secret Characters
1) Phoenix/Dark Phoenix
2) Galactus
3) Akuma
4) Captain Commando (of course)
Yeah, that would be my roster...I think its pretty good.