Nexon has brought up a few new things since the game came out like Snowball during the winter, Spy hunt, Fireteam mode for Co-op Likers Lol, Even Quarentine mode for a bit more action && of course a couple of new maps
Should Nexon add in a few Vehicles [If they add bigger maps] && Maybe Air support for Quarentine in Two Towers && Fireteam for those who can get the Tank -__- :: b/c Nexon has failed alot && this would be One of the best things to happen if they added these to in the game !
Edit: if they but bigger maps it wont be complicated if they add vehicles