The end of the world is nigh.
Oberon’s pronouncement has done little to stir his children to action. Still locked in vicious political struggles, they fight for territory and position. The first to turn away and move on the problem of the universe will lose everything in Amber. Thus, they continue to fight, and risk everyone losing everything.
It falls then to the youths, the exiles, the lost Amberites to try to prevent the growing imbalance from tearing everything apart. Without centuries-old grudges to entangle them, they can look out and see the big picture.
The big picture looks very much like a spear of burning Flux, piercing the heart of Amber.