Lately my brother and I have been debating why DC Universe Online is not on the Xbox.  My brother believes the Xbox hardware is not capable of handling the size of the game and would require multiple discs to play.
  
My position is 1. It's made by Sony Online Entertainment, 2. Microsoft would want a cut of the monthly subscription fee, and 3. Microsoft would want to control how updates are pushed to the game and also want to charge users for that content.
  
Excluding the first reason, do you think there will ever be a subscription based MMO to come to the Xbox 360?  Please end this sibling bickering.