English Premier League matches in the US get a 0.3 to 0.4 rating.
In other words, matches played in another country by foreign teams already get almost half the viewership that domestic hockey games get.
The World Cup isn't replicable on a day to day basis any more than the Stanley Cup finals are.
The Stanley Cup gets maybe a 3.5 rating depending on who's playing.
The FIFA World Cup US game got a 14 rating.
On weekend mornings, even, as opposed to prime-time.