post-game content

My idea is that after killing the dragon there is an imbalance in the 3 dimensions of the game (current) in the nether, the abandoned portals could be activated or rebuilt by the piglins, triggering the corruption of the nether to enter our world, in the end The cities of the end could have a greater variety of enemies since these were hidden by the dragon for fear of being eliminated or something, in the overwold it falls on him, causing corruption to allow mobs from the nether to live here without being zombified and The normal mobs could be contaminated as well as more end entities could be around and the only way to rebalance it would be to summon the end dragon again, making this a cycle or a loop that the dragon is important to balance.