I personally can't stand him but how about Tom Cruise.... he does have a huge fan base (for what reason, I don't know) and it could bring more fans into the Alias web.... and Alias is the reason Tom Cruise wanted J.J. Abrams to do his next Mission Impossible movie --
Kramer from seinfeld.. It would be hilarious if Kramer got mixed up with the covenant because he was just doing something retarded, and Syd had to rescue him, and Jack had to babysit him
I'd like to see Shakira for a Latin American or Spanish misson of Sydney's.....or maybe Evangeline Lilly from Lost....her and Sydney would be awesome together!