My Ideas
1. being able To Customize characters: i would like to be able to earn things to put on your character like clothes bandana's bandoliers and whatever else
2. 4 vs 4 4 players on Survivors side and 4 on zombies Side and 8 players against normal zombies
3. a Weapon that i designed its a pod that you fire into the wall and it fires another automatically into the wall and electricity flows between them like a Deployable Electric trap, they can stay there for an entire round but you can get 3 out of the whole game
4. Vehicles
That's all and if anyone from treyarch are looking at this message please have a go at making my ideas and figuring out better things on my ideas cheers! :D