After the revelation of Kralkatorrik's greatest fear in the last living world episode, I couldn't help to think about it. From the wikia:
Kralkatorrik revealed its greatest fear to its scion in private:
it had foreseen a potential future of a world without strife between dragons and other races and without Kralkatorrik itself.
That's a really relatable fear that he has, close to what us humans could feel: Anyone would feel bad if they knew the world would go on and be better without us, becoming forgotten. Now, we've seen at least 2 elder dragons that have what appears to be 5-races level of intellect: Mordremoth, who we spoke with in the final battle, and now this revelation that Kralkatorrik has a really complex fear. Most likely the rest of the elder dragons do too, only we aren't able to communicate with them? Sort of a language barrier that needs to be overcome just like Aurene and Caithe did.
Is Kralkatorrik the only elder dragon that is extremely evil and would refuse to negotiate? In his vision, it saw a world without strife between dragons and other races, meaning in that reality there were dragons (presumably elders and their servants like Tequatl and Shatterer?) living in harmony.
Do you think that, from the very beginning when we fought Zhaitan, we could've isntead tried to negotiate with him and later Mordremoth, and spared so much death and destruction? Could we just like, communicate with Kralkatorrik and just say: "Look, we know you're afraid of a world without you, can we just be at peace with one one another?" I guess we would have to find a way to live together and figure out how to have magic for both the world and the elder dragons to consume.