I've admired DM for as long as I've been into cycling. The guy just has a certain panache about him. Even in the drug revelations, he was honest about his personal failings and those of the "system" in a way that many other caught dopers have not been.
I suspect he could go down a couple of paths: sport governance, team governance, or media. He'll probably succeed at any, as he appears to have the smarts, if his articulate and knowledgeable writings are anything to go by. And I hope he does succeed.