Question for king of the hill is that when is it hosted between X amount of time or is it based on challenges? ´
If the hosting happens automatically between time, like other events it would need to have lobby system to schedule fights between teams. In that case the reward would need to be a lot bigger, atleast 10m+ to interest enough people to combine teams for it.

If it was started upon challenge it would need to have entry fee and winner would take the whole pot.