Unless Frank/Mick/Chas or Dave are promoting this then it won't be at Wembley. Hearn would clearly prefer Khan/Brook at Wembley. It's a non starter.
If it's on sky it'd have to go through hearn, and barring terrestrial tv getting involved there's no better option
casual / non-boxing fans don't know who manny is in england. He needs to beat Amir khan in england for them to know him. And i hope he does beat him.