The characters for my next book are alre

The characters for my next book are already gathering in my mind. That’s the one that will follow the one I’ll write after the Legends trilogy is finished. And I don’t even have a title for the one after the Legends trilogy yet. How will I ever think of a title for the one after that?
But I know that’s how it goes. One story appearing on the page while the details of another are being jotted down and the story after that is wispy thoughts caroming around in my mind.