Waaay back in... '89? '90? The talk was that there were twelve Great Dragons, period. That changed heavily when Germany dropped, but ... it always struck me as an interesting concept that there's a hard limit on how many Greats there can be and that, once that number's full, you have to bump off someone to move up.
And... man. That had *so* *much* potential.
Sadly, things went away from that and, now, I doubt such a concept would have any traction.
But, you know ... what might have been.