Future captain means after Del Piero retires, because personally I don't think he is going anywhere.
If you ask me how should the arm band go in Juve at the moment I'd say like this:
Del Piero
Ferrara
Tacchinardi
Pessotto
Birindelli
Zambrotta
Thuram
Buffon
Nedved
Camoranesi
Cannavaro
Although I have all the respect for Thuram, but I think when Alex is not playing Zambrotta should wear the arm band or if Pessotto or Ferrara are on the field one of them should wear it before Zambrotta. I really think Juve should try to keep the band around an italian arm.
About Tacchinardi's temper, during the past years he was our third captain after Del Piero and Ferrara (since conte didn't play much). He was very respectable and mature on the field. Infact during the days he was a captain he was very calm and produced his best football. Lippi new how to bring out the best out of Tacchinardi, unfortunatly Capello didn't. Tacchinardi is one of the best DM in Italy. To see such a talent sitting on the bench not used is really sad.
I am not saying that Capello is a band coach.. No not at all, but I am just saying that I feel Lippi managed to deal with some situations better.
The way Capello made Juvetus play gave us a very strong early season boost. The problem is that we became players dependant. We became depandat on Nedved and Emerson to the extreme. For me I think getting both Blasi and Emerson plus keeping Appiah was too much. We should have bought either emerson or Blais, or bought both and sold appiah to get an OM or a creative midfielder like Maresca/Pirlo style.
Sorry got off topic and I hope this does not open a discussion here. I just wanted to justify my list above.