I actually had an idea for a vehicle in nex.
It would require minimal coding (althought im no coder so I can be sure) and would be VERY different from other games.
Basically there is a large structure, thsi large structure is part of the map.
In the large structure there is a control room in which there are many buttons.
Lets say 6 of these buttons make it move. when you hit one of the buttons the large structure turns X degrees.
In another part of the structure there is weapons control. In weapons control you hit a button and a single weapon is fired. ( I think this would be the trickiest to code, but again, I'm no coder so I cant be sure)
This is just the basic drift of the idea.
It would be best if these vehilces were in space or on the ocean but it might be cool if they were really giant tanks.