Interesting theory but it has one flaw: if McCain doesn't get the nomination you're theory isn't worth a hill of beans. Because as you say, the media will be pushing McCain all the way.
And I hate to break it to you (seeing how it's going to wreck your theory, and all), but McCain is NOT going to get the nomination.
should've used letters not numbers. I have no idea how the GOP primaries will turn out - but the media clearly wants a Hillary presidency.
It's possible they see McCain as her weakest opponent.
The media has the "Build you up to tear you down" policy
for any GOP nominee - following the Conventions.