Boss fights and how to Win the Game

Currently there are 2 boss fights 1 for each non overworld dimension they both drop a trophy for beating them. When you defeat the ender dragon you “win” the game well the wither has nothing to do with winning which doesn’t make sense. To solve this I propose two very similar solutions both having to do with the deep dark which will hopefully be added when dungeons 2 is released and if mojang holds to there pattern of 1 boss per dimension it will have a 3rd boss fight. Idea

1: The final boss is in the deep dark and to fight him you have to do something with both the nether star and the dragons egg. Idea

2: The new deep dark boss would drop some type of trophy and you would use that along with the other two in order to unlock the final boss fight in a specific location in the overworld.