I predict this will actually be an "Early March" update to coincide with the 3rd year anniversary of the game. Otherwise to join the "big" update hype:
Circuit:
Twin Ring Motegi (Apparently under development, I'm picking this to go against the grain of everyone saying Pikes Peak)
Cars:
Nissan R390 GTI (Endless doom pick that could very well arrive one year after the GT-One)
Audi Quattro SI (datamine)
Mazda Autozam AZ-1 (datamine)
Tesla Cybertruck (not a fan, but I have a feeling this is coming eventually)