How big of a fight would Khan vs Brook in the UK?

[heihaci]

Brook is a big draw & is selling out arenas, most Amir Khan fans claim he isn't but he is and most casual fans like him. He is popular here.
Pretty much everyone has heard of Khan but hes widely known as having a glass chin and the hype has gone.

Most casual sport fans have never heard of Kell Brook

[Tom Cruise]

though i hate to pull an Arum, id let this fight marinate a bit. Only because Khan is on a losing streak, and Brook is definitely not as popular yet as he could/will be.

If Khan strung some wins together and Brook can either get a title or at least be mixing with world level fighters this fight sells big tickets.

The asian community would lap it up. Not to mention Manchester and Sheffield are quite close and normally up north that means they dont like each other.