“Guzen dazo!” “It’s Gonna Happen!” mistranslation? Big buzz in sports in japan!

Japan is all abuzz about this fan seen at the Cubs game He was holding up a sign which said, “It’s Gonna Happen!” on one side, and “Guzen dazo!” on the other side in Japanese characters. Assuming that the English for “It’s gonna happen” is correct, then “Guzen dazo” which sounds more like, “It’s just…