There could be a wounded ncp somewere on the map. The human players have to go to the ncp
and protect him for a certain amount of time while the wolf team has to try and kill the ncp. Humans could spawn around the ncp, a short clip plays showing the ncp and one of your guys calling in for backup and then game start. Also no respawns once your dead your dead. I think it sounds pretty fun
For the map it could be an old train stations, abandoned trains and buildings could provide cover for wolfs.