But, they all voted for "don't want him". I understand why you're being pessimistic about the deal, but tbh, I think we did have the Thiago deal until Moyes told Woodward he wanted Fabregas instead. Van Gaal appears to be the one who chose to go after Vidal in the first place (imo, he decided not to go for Kroos) so the situations are probably quite different. There also hasn't been any reported interest as of yet from any other club. I could potentially se Bayern becoming interested, but Vidal and Bayern don't appear to be on good terms, Madrid have bought Kroos, Monaco appear to have lost interest in spending large amounts of money on big players, Chelsea appear to be satisfied with their midfield, Barca don't have the funds for another expensive signing this season and PSG will risk being reprimanded because of Financial Fair Play if they splash out on another massive deal. Honestly the only team I could see competing with us for Vidal is City, but that would only be if they decide to sell Yaya and I'm not sure who would buy him. Without selling Yaya, I think City would struggle to meet FFP.
So there doesn't appear to be a great possibility of any other big clubs going in for him. Bayern could still be a threat, but from what I've heard, Vidal seemed to annoy them when he chose Juventus over them. They also have the best midfield in club football. One could argue with Kroos leaving a space could open up, but they still have all of Schweinsteger, Martinez, Thiago, Gotze, Muller, Alaba and Lahm who can all play in the 3 central midfield positions. If they were to sign another cm, it would probably be as backup.