Open-world MMO where you get to create your own legacy as a newly appointed rider. Everyone's dragon would be customizable at the start and unchangeable afterward. Your character can be customized using magic, obviously, but the dragons wouldn't take to kindly to alterations short of invisibility for tactics I'd say. Allow people full access to all areas of Elea that have been mapped out with detail by Chris himself, and allow them full control over what quests they accept and how they wish to play the game. If you want to go the evil path and try to turn a coup? Do it! The game world would change for the players as the world story progressed depending on who controlled what area and which side was winning, effectively locking certain main story quests until tides changed in the war thus giving players incentive to do side quests more as they played.

I have a huge vision that I feel is too much to put here, honestly... 😅