I've said before, people in the UK would go for the occasion more than the fight. I think the thread title is wrong though. it's not KHAN selling out Wembley. I reckon if Brook fought Mayweather, it would also sell out Wembley. If Froch v Groves can be marketed so well it can sell out Wembley , then I'm sure that by the time fight came along , Sky and the rest of the media would have everyone believing that the Brit is gonna bowl over the Worlds best with ease!
In reality, there are quite a few fights that would sell out Wembley , believe it or not.