Since we have to consider only a realistic update. And leave wishes beside. My predictions are
Hyundai Elantra TCR (almost guaranteed)
Xiaomi SU7 (likely)
Yangwang U9 and Honda Prelude (very unlikely for now)
Other Cars (just dreaming)
Tracks:
I'd love it, but we got 2 on the last update. Sorry, but I can't see it
As for the events, probably a new Gr4 is expected. And, while I can't say for sure, something for the F3500B is possible I believe. Why? We'll recieve one for the Viewers campaign of the finals. And might count as a "new" car. Usually there's an event for every new addition in the game.