What is the final end-game purpose?

- Ending/Objective should probably be decided on, and the players given a rough idea of what to expect later on as the game progresses in development. Are we going to be able to travel to other kingdoms and attack them? Do we win the game if we wipe them all out? Or is this a forever-sandbox kind of game that never has a goal? I see the roadmaps have been posted, but I don't see anything that actually mentioned the end-game goal, either.