Re: Breaking Bad Season 4 Premiere Sun 10pm AMC (Spoilers!)
As for the ending, I have visions of everything fast forwarding 15 years, Walt has retired from the 'game' by the skin of his teeth, but w/ more money laundered than he could ever hope to spend. He's working in the office at the car wash when one of the employees comes in w/ a bag of his "blue meth creation" found in one of the cars he was cleaning. The same type of Blue Meth which Walt and the DEA had thought completely vanished. The blue meth, Walt's formula is found in the trunk of his daughter's car, and so the empire is reborn......
The scarface scenerio is more likely, and something that Vince Gilligan has mentioned before as an inspiration for Walt's character.