Slightly Mad Studios' CEO Ian Bell has given some indication on the Project Cars forum as to when the second game will come out, as one post said regarding release date: "It's still a very tight run as we're a bit behind on GUI and Career so nothing is set in stone yet. Current guess is Septemberish."
In another post he also said: "None of the famous brands are missing this time. We've started QA already. We plan at least 7 months of QA for polishing and bug fixing."
While none of this is even remotely certain, "Septemberish" sounds better than nothing. Are you excited for the sequel?