Apocalypse vs Sebastian Shaw
The two team wreckers battle each other inside a 40 ft cube with indestructible walls, 70 degrees, recirculated oxygenated air, and 80s rock music playing. Each one gets to watch the opponent’s X-men movie for prior knowledge.
Scenario 1: Apoc has all powers.
Scenario 2: Apoc has all except transmutation.
Scenario 3: Full powers and the cube has 1 foot long adamantium Wolverine claws poking inside the walls every 6 inches except not on the floor.
Scenario 4: regular smooth walls and full powers except a Cyclops blast is shot from a random location at each participant every 8 seconds from the walls.
Possibly redo scenarios 3 and 4 if necessary, without Apoc transmutation powers.
Cube is located inside a shield helicarrier, suspended with a large amount of gravitonium from Marvel Agents of Shield. They are flying over Wakanda getting ready to empty the contents of stored bathroom waste water.