Why do you think Son plays no matter how off colour he is?
If we're talking foreign fans as a whole, I have little doubt Koreans make up the bulk of those at the game on a matchday.
Do doubt we'll have a 2 legged pre-season playing in both our overseas cashcows.
We used the likes of Keller, Friedel and Dempsey to get our toes in to the US market, and look how many US posters there are here. Son was a way into the Korean market and now Ange has opened a door into a sports mad country without much affiliation with the PL.
Viduka, Bosnic, Cahill, Kewell, probably the only big players I can think of. I've looked through the list and none of the others are household names.