For comparison;

"A Knight's Tale" in it's opening weekend grossed more than the first "Highlander" film did in it's entire theatrical run here.

"Wayne's World" opened to a little over $18 million and went on to gross $121 million in America.

From what we have seen, if a Queen song was strongly tied in to a hit film, the song goes on to be a hit so hopes are high for Queen + Robbie's "We Are The Champions".