Bungie should add a DLC where it's 2 ghosts that fight each other and you have the decision to help whichever one you want, the catch is, you yourself is a ghost fighting an army of Dinklebots if you side with Nolanbot, an army of Nolanbots when you side with Dinklebot, it's like a survival almost except the ghosts would get upgrades as the waves increase, you would have to buy upgrades which some would be permanent, and after a while, the main ghost finally comes out, but is really hard to beat. That's my idea for the war of ghosts