From 2011-2014, Brendan worked as the NHL's disciplinarian. He has since left that job for other opportunities; namely, serving as the Toronto Maple Leafs' president. It's been a while since Shanahan handed down a suspension (or recorded a video explaining one), but he was the face of suspensions in the NHL for some time.
Brendan Shanahan (@brendanshanahan) April 27, 2016
While the original complaint seems to be more geared towards punishing others for the liabilities they take with Flyers players, the desire to free Brayden Schenn from his three-game suspension is still a legitimate one.
Maybe Ron Hextall can enlist Shanahan as backup in the appeals process? I wouldn't want to go up against the two of them together.