LOADS:
A TITANIC TEAM TILT! A Sunday Night MAIN EVENT!!!
JUSTICE LEAGUE
(Hawkman, Aquaman, The Flash, Wonder Woman, Superman and Batman!

)
vs.
THE UNCANNY X-MEN!

(Wolverine, Colossus, Nightcrawler, Storm, Cyclops and Thunderbird!)
A Chamber, 30 feet wide, circular. 30 Feet high walls. Concrete. No doors. Air mixture same as earth, same gravity. Ceiling is a force field 30 feet covering chamber that cannot be broken.
Only way out is complete victory over opponent by submission or death.
Walls cannot crumble or crack. No phasing through, floor is solid concrete as well:
LET THE COMBAT BEGIN!!!!