However, Italy and Lithuania will not be in the same group. So they will not meet in the preliminary round. Lithuania should advance out of the preliminary round, Italy I don't have a clue.
However, even if we don't get to see Bargnani vs Valanciunas this summer if JV makes the final Lithuanian roster we should have a good chance of seeing JV go up against Kanter who is on the Turkey final roster. Turkey and Lithuania are in the same group. This means that for sure they will play each other at least one time.