Do you mean individually or the institution?
For individuals it doesn't matter, he'll never know what you or I think, and even if he did, who cares. Nothing you say to an actual narcissist will ever make any amount of difference anyway. They might bask in it, sure, but in the end they are always in an eternal state of misery no matter what they outwardly portray, so bask in that. In the end, do what you want here, don't let his feelings have any effect on your thoughts or actions, be as vile or as docile as you want. He doesn't deserve even a modicum of respect.
For the team/coaches etc... he should be no factor and if I were Key I wouldn't even bring it up, not because of anything other than when it comes to the game itself that is irrelevant, every second should be spent only on what goes towards winning the game. Make the statement by winning, and of course if Key wants to kick him in the nuts after we destroy them, that's fine with me as well.
The media is going to do whatever they are going to do, so again, who cares.