I love the way that the pundits now accept that if American football comes to England more, > football will have to move from Wembley, the national stadium.
Surely it would be easier for American football to find its own stadium in Milton Keynes or somewhere.>
Well, I think it's also the case that the FA want to move the games around the country. It was a success during the non-Wembley years, and other countries, such as Germany, do it out of choice.
And the NFL causing it is really a bit of a red herring, caused by people not understanding how the NFL works.
The NFL season is 17 weeks long, of which there are 8 home games, plus between 0 and 3 home playoff games. The majority of that occurs during the international off season, the only clash is for the October and November international windows.
NA sports are very good at scheduling to allow for stadium sharing, I'm pretty sure they can manage to block out 2 weekends of a 17 week season.