Massa won't win the title, not a chance, he's strictly no 2 driver, if reliability is enough to potentially put Alonso behind Massa even with Massa letting him past, it will be insanely unlikely Massa won't have reliability problems also.
However with a proper car and Massa on end of last season form, that is a very strong partnership, its yet to be seen what Rosberg can do with a top car, but Merc have a strong line up. I don't particularly rate Webber, winning a few races in easily the best car over the past 3 years isn't hard. The number of times he puts in a crap qualifying performance, he's far too inconsistent to be considered a top driver.
For the first 1/3 of a season I think Ferrari/Merc will be fighting it out for the top spots, who knows after inseason changes to cars.
Alonso/Lewis are by far the best drivers, if either team give them a really competitive car, they'll win the title, if they don't, it will be Red Bull, Mclaren don't appear to have the car, and don't have the drivers. It will take a Mclaren with Brawn style domination for half a season for either of them to win anything and there are zero signs of that so far.