I doubt any of them are because that seems to be a cliche route in any type of storytelling. (friends/allys are traitors) I believe the makers have many more crazy unexpected twists to show us.
Welcome to forums btw
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by itsamea-mario:
I was gonna say that, WHAT a twist it would be!!!
I jkz ofcourse. </div></BLOCKQUOTE>
Would be pretty cool in a way, although it would also be retarded at the same time.
On a more serious note, I don't think any of them are traitors, but it could be any of them.
Lucy ACB spoilers <span class="ev_code_WHITE">because she is stabbed in ACB</span> /ACB spoilers and she has worked at Abstergo.
Shaun..well, I like his sarcastic remarks, but most people tend to dislike him, so who knows.
Rebecca is the least suspicious of all, which makes her a suspect!!(omg, I'm getting paranoid)
Lucy, she got killed for a reason i think. And there are some clues about her shady-ness during ACB. But then again William M seems to be working closely with her, so i cannot be sure. I voted for Lucy anyway, because of some of the strong evidence during ACB.