Spartan 117 (book feats allowed) versus the. MCU Avengers.

Chief gets: Plasma Sword. Silenced pistol. DMR scoped rifle. Plasma pistol. SMG. 3 frags. Cortana.

Avengers Roster:
Hawkeye
Winter Soldier
Cap America
Black Widow
Falcon

Fight takes place in a mountainous forest. 1 mile starting distance.
BONUS: If Chief wins, add Gamora and Rocket.