The Rules: Each of the combatants minds have been wiped by the Grandmaster. They have no knowledge about their opponent at all, be it the their name, their power level, their skillset, etc etc etc. So for example, later on in the tournament if Captain America fights Hawkeye or Crossbones or Black Panther, it will be treated as their first meeting....ever. Same can be said if and when Batman confronts Hitman or Bronze Tiger or Black Canary, etc etc etc.
The combatants will start exactly 100 yards from each other and will only know the general direction of which there is ie: North, East, South, or West.
Location: The battle will take place in an amalgamation of Skartaris (the Land where Warlord hails from) and The Savage Land. Once again the only two living lifeforms are the two combatants. The land is filled with lush prehistoric jungle, tar pits, quick sand, high snow mountain peaks, canyons, etc etc etc. The battle will take place at full moon midnight on a clear summer night