Camoranesi - Gilberto - Tiago - Nedved looks nice, and I think Tiago will fill in quite nicely. I've been following him since his Benfica days, and I think he's class, and a real team player. I saw the Lyon-Lens game a few months ago, and I remember he selflessly stepped back and allowed Juninho to make the goal, though Tiago could have done it as well. He's well-liked by his teammates, and he's one of those guys who doesn't need to be the center of attention. For him, it's all about playing good football.
Two hurdles though. First of all, Tiago's very comfortable at Lyon. He fits in really well with the Brazillian clan at Lyon (Juni, Fred, Cris, Cacapa, and at Chelsea, he had Ferreira and Carvalho), and he's guaranteed to be a starter, as well as CL competition (with a good chance at winning). Money isn't important to him - he left Chelsea because of lack of playing time, though Mourinho wanted to keep him. And unlike many others, he doesn't consider playing in the French league a step down. He really enjoys it there.
So for him to leave all that behind, he has to love Juve or love the challenge - the second might appeal to him, I think.
The second problem is the cost. Juventus is going to have to shell out quite a bit of money for Tiago. He may not be worth as much as Aulas will demand, but Lyon don't need the money, so they are in a position to bargain - and they are also happy with Tiago, so they will want to keep him. Since they no longer want Trez, Camo, or any Juve player, there aren't any potential bargaining tools. Coupled with DD's refusal to discuss Trez's transfer (which irked the Lyon staff), it's going to be pretty complicated.
But Tiago in a Juve jersey...