This will fail.
There is not enough interest from just Londoners to go to these games 8 times a year.
I have been to every Wembley game.When people go to Wembley games,it's fans from all over Europe,all wear their teams jerseys no matter who is playing and go for the occasion.Besides that the premier league does be on sundays most weeks now too.
That's the football in england,and London has so many teams in that,the sports fans will be at those games,if not they play the saturday and people go out for the games then go out and party,they won't be then doing it on a sunday.
That's just the problem with filling the stadium,now the problems with the logistics of having a team there,and like people said,players refusing to play there,be traded there or sign in free agency.
This whole thing is doomed.Just keep doing what they are doing now,it's fine everyone seems happy with it,and they are making mooney,but the greed will over come all the sensible thinking when it comes to this.