to win this game, juve must score at least 2 goals. this means that we need del piero and zlatan playing well. With trez in the team, its very possible to score more than just the one goal like the team normally does.
As for Olivera, i think its important to give him chances. Last game, he came on early and he probably wasnt expected to feature at all in the game. If he starts, i believe he can play well and add something to the team.
Its unlikely capello will field zlatan, del piero and trezeguet...he will still want stability but would need more creativeness in the team. Olivera is able to give this if he replaces nedved.
One thing though, Olivera needs to play in the hole behind the forwards, i think he could do more damage that way.