As cool as it would be, it would take a lot of art assets. Drozan Station at least had the benefit of being self-contained, but now you'd be talking about creating a whole outdoor environment without any art assets borrowed from existing assets to help you out. Besides the fact there there aren't any mechanics currently in-game for using vehicles with a player character.

There again, they might be able to borrow some art assets from Champions Online, which could help creating such a mission a LOT easier...