I think the question that has to be asked, and has not been answered, at least not for a while, is this.
Why would Vidal want to go to Bayern, when he has built his career here, is absolutely adored by the fans, and he himself has stated that he hopes to be at Juve for a long time?
Also, if , and this is a BIG if, Juve actually initiated this, why would they limit themselves to just dealing with one club? Surely a player like Vidal would entice a legitimate bidding war.