Aubrey McClendon is gone – or at least he's on his way out from Chesapeake energy (CHK). But the destruction of the natural gas market, where he was the ringleader in the shale gas land grab and cratering well price, is his real legacy, and not likely to be recovered from anytime soon. While Aubrey will now go into a very wealthy retirement, he leaves behind a decimated market and a long road to making natural gas a true transition fuel to energy independence and a renewable future.