If it happens, will the PL say 'you're either in the PL and out of the World League' ?
I can't see that the logistics will work either. Man U play Saints on a Super Sunday then play Shanghai on Wednesday then Arsenal on the Saturday.
If they have to chose between the WL and the PL - I'm sure the fans, at least, would chose domestic football?
And the players. Would they really only want to play 16? Games per season in the WL ?