... the elder dragons won?
Let's assume that the elder dragons were actually unbeatable by any "lesser beings" and end up destroying everything in their path. So, what would happen? Would they then try to fight each other until there was only one? Or would they just shake hands, pat each other on the back, say "Good work!" and then go back to sleep?
If I recall my lore correctly, there are evidences they already destroyed the world once (or came close to it). So I am guessing it would be the second option. But it certainly would be interesting if they were all competing for territory/food/whatever their motive is. It would be even more cool if we could actually take a seat and see some of them fighting each other!