sry but you should inform yourself better if you open such a thread. right now over 100 cars revealed and turn10 is releasing new cars every wednesday until launch:
http://gamrconnect.vgchartz.com/thread.php?id=169230&page=1
also funny that this thread got already more posts as my thread which i update every week. seems like people only care about it if it could be negative. the information about the cars itself doesn't interest people on vgchartz.
and yes, i fully expect a few cars less at release but nothing which i will recognize when i play the game...