The main numbers (1,2,3) are saved for new protagonists, and new settings.
My bad, you're right. However, it's the third game in the series so it's not really that important. The game is the same no matter what people call it.
omg seriously its not comin out in 2012 its comin out in nov 16 its still gonna be ezio but ur just in roma and u can lead a band of assassins into ur missions