What I propose i that every now and then you will go to a regular place but have something else going on there. Maybe you are going to a park but when you get there you find out HERC used that park as a mobile hospital so there is a higher chance of medical items but more zombies. So what I guess I am asking for is that there is a chance (bigger chance for the more likely things) that you will go to a location and there might be different boxes, higher chance of a type of zombies or different loot.
When you go to a residential house and find a little setup for making 'painkillers'. There is the same loot as a regular house but with a loot able drug making set that you can get a few 'painkillers'. Maybe also 2 hazmat zombies when you get there. Very rare chance
Happens at parks where the HERC have made the park into a field hospital. There are about 30 zombies to begin with and the loot is the same except for more bodies and medical lockers. moderate
In parks (maybe other places) a helicopter has gone down. You can loot the helicopter although it takes quite a bit longer than most containers. The helicopter will have a 60% chance of a lmg although it will probably be a broken one. You can also find other weapons, ammo, gear and metal in the helicopter. rare
I will update this as more ideas come to mind. Also I understand there are bugs that need to be taken care of before something like this is implemented but I just think it would be a nice thing to have before the end of beta.