Sounds like Bettman is the big winner. He beat the union and brought some sanity to the league. Why retire? He needs at least a year of gloating.
Bettman also guided the NHL to the craziness by twice renewing a CBA he said was flawed. And cause the NHL to be the first major league to cancel an entire season due to labor dispute. Good reasons to retire, he's got nothing to gloat about.