End Boss Fight but BETTER

People have been wanting an end up date since forever. I think a good addition would be to have random versions of the end fight. Similar to bastions. I think this would make each end fight interesting to the specific seed and world, and it would keep it play through fun. I also think speed running would be changed interestingly with the end fight being more uncertain than before. There could be a brute one with strength and fighting, parkour and movement skill, maybe other versions with the need for more preparation like potions or you need to unlock something with redstone, even needing to tame a specific animal or obtain an item as a 'offering'. They could highlight various aspects of the game and encourage casual players to try the different aspects.