I dont think that Vidal can co exist with Pirlo as the CM duo, in the physical serie A, in a team with very low tempo, like Juve.
But he can work well with Marchisio, maybe even better than Melo and thats probably our long term plan.
Considering this, i believe that he will throw Pirlo on the bench, before the end of the season, or make us sell him out next year and spend our next years transfer budget on yet another CM, just like we have been doing every season, since we returned back in serie A...