One of my favorite levels from the Senseless Destruction campaign was the one where you had to shoot a Moonhawk with a cannon. It was very easy but it was very fun. I'd like to suggest an entire campaign around this, a "Sniper" campaign (didn't think of a name yet) where you have to shoot targets in order to win. here are some level ideas: A level where the car is on top of a cliff and you're at the bottom; A level where you're on top of a cliff and have to shoot a car at ground level very far away; A level where the cannon is in the back of a moving truck and the car is following you a bit far away; A level where you have to shoot a car through brick walls; A level where a car is driving on a circuit and you have to stop it; A level where you have to shoot a car jumping over you in mid-air; A level where a car is moving towards another car and you have to stop it by shooting it, if they crash is a fail. It's quite a simple idea and I think even modders can do that, but I'd like to see something from the BeamNG team.
Have to say, this is one of my favorite suggestions here in quite a while! Shooting things with the cannon is REALLY fun and satisfying and I would sure love to see the game do more things with it, rather than just having it as a one-shot (pun intended >: D) thing.
But unfortunately, the next campaign is going to be Senseless Destruction Part 2. Maybe the next campaign. Evidence for previous statement is http://beamng.com/attachments/capture-png.191053/?temp_hash=6876acf156720b25c145e26314613d4a (Found in Beamng.drive\Locales\en-US.json)