tiered battles

Each combatant is healed after each round. The winner of each round becomes the leader of the next round. composite versions of all characters

Round 1 Rocksteady TMNT vs Bebop TMNT

Round 2 Rock n Bop vs Tokar n Razor TMNT

Round 3 Rock, Bop, Tok, and Raz vs Shedder, Shang Tsung MK1, Goro

Round4 Team TMNT and Team MK vs Team Cold War----Captain America shield only, Winter Soldier

knife only, Omega Red, Zangief SF.

Round 5 Previous combatants vs Team Thick Skin----Colossus, Thing, Luke Cage, Blob and Rhino

Bonus Round All out battle Shedder becomes Super Shedder and Shang Tsung gains Noob Saibot and

Smoke

1. Rocksteady. The horn is a decent advantage.
2. Tokar and Razor. More viscious
3. Any one of team MK solos
4. Winter Soldier knife strikes the mutants one after another, Omega Red can take Shredder and Goro with tendrils, Zangief keeps Shang busy while Cap plays defense. Shang could kill Zangief, but it would leave him open to Cap. Soon Winter and Red join, and Shang gets overwhelmed. (I don't know if Shang too well though. Going off in game version)
5. Omega Red's the only one who can hurt the Thick Skinners.
Bonus: Shang and Co., Super Shredder is too slow to keep up with the three of them.

@fire_ant: Thanks for responding but Bonus round is everybody vs everybody. Shang Tsung just gains the ability to become Noob and Smoke. and Shedder becomes Super.