The developers could have a poll on this forum for the next cars to be released in the season pass. Have pictures and a short description of each and the 3 most popular make it.
Couldn't have said it much better.I'm afraid somthing like this would happen:
Word gets out to places like Reddit (apologies for my negativity but to me most game-related Subreddits feel like cesspools of entitled casual kiddies), players join the vote regardless of hours played, the enthusiasts get outvoted by the casual kiddies and we end up getting more cars like the Lawnmower, Sofa Car or Pocket Rocket. They get released, we drive them once or twice for the LOLs and never touch them again because the joke wears off quickly and after the joke has worn off there is no more reason to ever touch them again.