Over at Slate, Seth Stevenson takes the Megan-death theories, and raises it with a prediction that Don will be dead by season's end. He points out the death imagery follows both the Drapers – not just Don. But he doesn't do much to flesh out of the idea, other than arguing that it would appeal to creator Matthew Weiner's style: "How Weinerian would that be? Icing the icon of your show seems like the sort of zagging – a rebellion against TV's established order, if you will – that Weiner can't resist."
If that's the case, then what will season 7 be about? Everyone at Sterling Cooper waxing on about his legacy? (Aside from some clever ads, there really isn't much, when you think about it.) The truth about Don's identity switch? Sally going full throttle into teenage rebellion?
If "Mad Men" could be understood as the life and death of the 1960s, and Don Draper the observer-participant in America's transformation in that period, then his death in season 6 would make season 7 a eulogy for the '60s – not the craziest idea. At least not as crazy as the theory that the whole series is just a story written by Ken Crosgrove.