[Guyver Spawn]

I made my own MVC4 roster with 27 characters on each side.

Marvel:
1. Spider-Man
2. Miles Morales
3. Captain America
4. Thor
5. Iron Man
6. Hulk
7. Doctor Strange
8. Hawkeye
9. Black Panther
10. Wolverine
11. Storm
12. Phoenix
13. Scarlet Witch
14. Loki
15. Magneto
16. Deadpool
17. Cable
18. Doctor Doom
19. Mr. Fantastic (With the other F4 characters being his own assist characters similar to how the Ginyu Force were in Dragon Ball Fighterz)
20. Ant-Man
21. Rocket Raccoon
22. Ghost Rider
23. Venom
24. Shang Chi
25. Silver Surfer
26. Blade
27. Dormammu

Capcom:
1. Ryu (Street Fighter)
2. Chun Li (Street Fighter)
3. Akuma (Street Fighter)
4. F.A.N.G (Street Fighter)
5. M. Bison (Street Fighter)
6. Haggar (Final Fight)
7. Akira Kazama (Rival Schools)
8. Strider (Strider)
9. Asura (Asura's Wrath)
10. Morrigan Aensland (Darkstalkers)
11. Felicia (Darkstalkers)
12. Jedah Dohmu (Darkstalkers)
13. Pyron (Darkstalkers)
14. Captain Commando (Captain Commando)
15. Megaman (Classic)
16. Zero (Megaman X)
17. Dante (Devil May Cry)
18. Vergil (Devil May Cry)
19. Nero (Devil May Cry)
20. Chris Redfield (Resident Evil)
21. Jill Valentine (Resident Evil)
22. Nemesis (Resident Evil)
23. Phoenix Wright (Ace Attorney)
24. Frank West (Dead Rising)
25. Arthur (Ghosts 'n Goblins)
26. Firebrand (Ghosts 'n Goblins)
27. Arisen (Dragon's Dogma)