This is something for a General's Handbook or a small supplement, you don't need a new edition for this kind of ideas. It also shouldn't be exclusive to one allegiance. If you want Great Game rules for CHAOS, then ORDER should have rules for a tournament, DESTRUCTION for a Royal Rumble-style brawl and DEATH for summoning duel between two necromancers. Each with different ressources and mechanics.
But speaking of ressources: GW shouldn't waste much time on something like this to be frank.