Really? When did Vince McMahon say this? You used the word "confirmed" so it's much more than putting two and two together, you've obviously had a private discussion with Vince McMahon about this, seeing as he's never come out and said anything like that in any form. The fact is, while Vince may like him (according to dirtsheets, and you're afternoon tea conversations with him) Triple H does not. Infact Triple H has scoffed at the idea of Miz being the face of the company (while on G4, promoting The Chaperone.) And Trips is the future frontman for the company, and he definitely has Vince's ear. Plus if history tells us anything, Vince McMahon is fickle and changes his mind on a dime. Miz is not the future face of the company. The only person whoever said he was was The Miz himself... and Michael Cole.
The Miz could never be a face, because outside of the few people on this forum who pop massive broners for him, The Miz is not likeable in any sense of the word. He's incredibly douchey and completely annoying. He has the size and look of someone who has to cheat to win, even though people on here complain that he doesn't mow everyone down like Goldberg.
Miz just doesn't have what it takes to be the top face, he's passible in the ring and overrated on the mic.