He won't.
Vucinic could be a terrific january signing though, provided he's fit. I don't know why he has played so little for Juve this season. Technically he's almost perfect. He's a creative, really intelligent striker with a strong finish. He doesn't score that many goals and can be frustratingly inconsistent, but that's the only reason he isn't a world class player. He's an improvement on what we have in every other aspect, at least in theory. Who knows how he'll adapt to Premier League in reality. I'd rather gamble on him than on Berbatov though.