Death Battle Ideas 2

Master Chief vs Doom Slayer Rematch

Halo vs Doomguy

Connection:

Both are super soldiers who protects Earth from alien/extraterrestrial threats (Covenant and Flood for Master Chief and Demons for Doom Slayer)

Both possess a wide variety of weaponry to combat said threats

Both also have been upgraded in the newer games (Halo: Infinite for Master Chief and DOOM: Eternal for Doom Slayer)