Gornot, I hate to have to correct you, since you put out a wonderful opinion on AC, but I felt the need to see if you misspoke, or are mislead.
Revelation is the end of Ezio's story, not Desmond's. There could be as many as 4 more games before we get to the end of Desmond's Story.
---The following sentence is a spoiler---
SERIOUSLY, don't read it and come crying to me about the fact that I blew it for you.
What I can't wait to find out is why he killed her at the end of Brotherhood. I bet she was a Templar, playing him for a chump