It's a very top heavy era no doubt. Andy will be the underdog because of his back injury. The bookies will probably tip Nole to win as usual. Andy was denied 3 times here. He'll convert it one time, that is, if he successfully makes the final.
I think (and hope!) he'll win it one day, too, but 2014 almost certainly won't be it. Never say never, of course, but it will be too soon after his return to win seven best-of-five set matches, over two weeks. I would consider his getting to the Round of 16 to be a great success, and nothing to be embarrassed about.
If he stays healthy, though, look out 2015! If he wins Wimbledon again in 2014, then gets the USO again, he'll be motivated like mad to keep it up, and get Australia.
As for 2014, I'm hoping it's Rafa, yet suspect it will be Novak. Again.