Zombies is already awesome but it gets boring after a while so there needs to be some new items. Such as: -When you get 100 kills with the perk on, it goes pro
-Stopping power
-more maps
-weaker but more zombies
-more guns
-a resupply crate but it comes at a price
-new drops (e.g a thing that freezes zombies
-attatchments for your gun
-satchel charges/C4
-danger close
-zombies look more badass
A real life mode will be awesome and you should be able to roam, need to eat anddrink, move furniture to block doorways, thousands of weapons, find survivours and trade and rob.