From an impending apocalypse to the promise of a new Van Halen album with David Lee Roth, the bar was set high for 2012. Everyone from the Mayans to Nostradamus prophesied 2012 as being the end of the world, but who could have predicted Green Day's epic trilogy of new albums, or Rush churning out their heaviest record this side of 2012, or Joe Walsh's first solo effort in two decades?