"Unused" Dimension

One you guys are done with the End Update, you guys should focus on the current Unused mobs. (the Zombie Horse (needs spawning), the Killer Bunny, (needs spawn egg, and spawning), the Giant (needs A.I., spawn egg, and spawning.) and the Illusioner (needs spawn egg, and spawning.)) A great way to do this is through a new dimension. The dimension could use blocks that are SUPER RARE, but, the portal is made of Endstone, making it a late game dimension. You'd use a Fire Charge to light the portal. You'd want to go there for an EPIC Sword that could turn into what you need. You'd also want to go there for a food source.