A recent email from Ubisoft has begun speculation that we could be hearing about Assassin's Creed 3 very shortly.
"Subject: Message from Abstergo
An offering to you who welcome a new dawn of man.
Take this image and answer our call. A great battle looms to finish
the past and begin the future. Stand ready to serve.
We will send for you soon.
- Dr. Vidic"
Obviously, take this with a pinch of salt as it could mean anything.