Under The Void

Minecraft should add not a new dimention but an extention to the end where after killing the ender dragon, it could maybe drop something that could be crafted with a compass to point to a new 
stucture called The Drop.  At The Drop you can find maybe new loot.  After Dropping you land on a new block that looks like a full block that acts like a waterlogged half slab.  You are then below the void where you can then explore 
new structres for more loot.