Two scenarios:
1) Team vs Team
Both teams have their standard ships, weapons, powers and equipment.
Fight takes place on an Earth-like planet in the Shi'ar Galaxy.
No prep-time. Their respective ships lock onto eachother in orbit above this planet and they begin their attack. After the battle of the ships is done, the losing ship crashlands on the planets surface, and the team battle continues on the ground.
2) One on One Battles
Starlord vs Corsair
Rocket vs Hepzibah
Gamora vs Raza
Drax vs Ch'od
Groot vs Korvus
Who wins?