Nahh, he’d still claim his legacy is intact, he’s the A side in any negotiations and, of course, Brook fight can wait some more.
He seems like the kind of kid who's going to need to be forced to stop because I don't think his ego will recognise that he won't compete at elite level. Getting knocked out again will get put down to a "mistake" and he'll carry on. I'm not even interested in the Brook fight as I'd much rather Khan retire and Brook see where he can go at 154 rather than wasting another 6 months of his career.