A light bulb just went on above me.
What if that cheeky Charlie Rose TV interview was a ploy by the DEA to egg Walt into coming out of hiding? The one liners about how insignificant Walt was to Grey Matter, the one-liner about blue meth being back out on the streets, how much money they were making as a company, saying that Walt was gone forever... it all seems a little overboard, like they'd set this up to bring the egomaniacal bastard out into the open.
Of course, the only people who know Walt would be drawn out by such a thing are either dead or in an Aryan cage - so, this is all not bloody likely.
Alright, that's my last hypothesis in this thread. It's been fun, kids. See you on the other side of Sunday.