I hope so, we have gotten so many hints, or not-hints for cars over the years so I hope that we will finally get them. I think there is a lot of potential for cars in the sims4.
Cars could have conditions, different types of engines with different fuel economy (petrol, diesel, hybrid, electric), travel bonuses, customization, cars that sims own could show up at parking spaces, sims could be able to buy cars used or broken and fix them up for a profit.
And the thousands of house builds that have oversized toy cars or debug cars can finally replace them with real cars...