Philosophically speaking, I'd ride like hell for the full year in as many places on earth as possible. There is no set budget right?
I'd take at least 2-3 months and do a self-supported bike trip across the U.S. West to East. Then off to Europe and ride part of the routes of the Tour de France and Giro d'Italia. Then to the far east and ride Thailand and down to the land of OZ and NZ. What a year I'd have as long as my health held out.
Interesting idea, but let's hope that such a scenario wouldn't come to pass except for the bike trips part that is