Here's my idea: You have a limited ammount of health, and there's a sh*tload of drone cars after you. These drones attempt to attack you by ramming you or using weapons, and come from either behind you or in front of you. The objective is to survive by either dodging them or using a limited selection of weaponry, which is more scarce and slower spawning than in other modes.
The longer you survive and the more you destroy the drones, the more points you score. But watch out, because every wave the drones become more aggressive, and your ass will always end up in a bunch of scrap metal in the end.
Basically, it's the scrapped Zombie mode from 2048.
Maybe we could call it something like Drone Attack?