I believe that captaincy should go to one of the heavyweights. Partly because Captain requires the respect from the players in like all animal kingdoms it is often decided by who is the top dog.
Secondly, I want my captain to be vocal, and point out to others what he demands from his squad.
In this sense, I dont think Zambrotta will make a good captain. Personally, I would give the armband to Neddy. For one thing, he will be proud to represent our team, and secondly he will serve it with distinction. Furthermore, he had experiences of leading a team before.
Nonetheless, I think Alex will keep his place in the team, and him being a Bianconero through and through, is really the one that deserve to the skipper.