Shao Kahn's forces during Mortal Kombat tournaments includes multiple combatants from various other realms (Scorpion, Sub Zero, Kitana, and Mileena immediately spring to mind), but to my memory, they are all from previously conquered realms.
The premise of the games and movies is that Shao Kahn's forces are trying to take over Earth's Realm. Aside from Earth's Realm and Outworld, are there other realms being actively represented in the tournaments? If so, does a overall victory in a single tournament by any one realm mean losses (and strikes against the required ten losses for conquering) for all the losing realms?