I think a book set in the very ancient past should be made. It should be a chronicle type book that focuses on the ancient empires and shows their interactions.
The story is always adding new ancient beings that have been sleeping for tens of thousands of years. Id like it if we had some storys from their perspectives and how they interacted with eachother. A little political intrigue, some major battles, what did the titan keepers think of these things, what did the early empires think of the keepers, the dragons, the giant machines, the early races, differing bug people.
They could even write this from the perspective of lei shens historian.
It seems like there is a massive gap with how old everything is and these ancient powerful sleeping people always knew so much more than we do today after having witnessed so much.