When North Beggar Hung 7 Gung and West Poison Au Yeung Fung killed each other on Mt. Hua during ROCH, the young Yeung Gor was helpless to stop them. He was unable to talk them out of fighting, and didn't have enough power on his own to physically restrain them from fighting.
What if all of the other Greats (discounting the Golden Wheel Monk, who would not have intervened) and near-Greats had been present, however? Could the combined strength of Gwok Jing, East Heretic Wong Yerk See, South Emperor 1 Deng, Chow Bak Tung, and Kau Cheen Yan have restrained Hung 7 Gung and Au Yeung Fung from fighting each other to the death?
Of course, we're basically setting up a Third Mt. Hua Sword Tournament in the process...