Endgame mode

The advancement when you defeat the ender dragon is called “free the end”. If you think about it, maybe the endermen are actually humans who are trapped in the end, and when you defeat the dragon you are freeing the endermen from being trapped. So my idea is that when you defeat the dragon, the trapped souls of the end escape through the portal, into the overworld and a new game mode starts - endgame mode. What this does is that new mobs spawn, biomes change and new blocks generate, perhaps new ores. I think this would be a good feature because the main “story” of Minecraft is pretty short, and adding an endgame mode would make the game longer and more fun to play post- ender dragon.