I don't -think- the Spear of Destiny factored into the Superman vs. WW book, but it's been forever since I've read it. Baron Blitzkrieg (first introduced as an Earth-2 character) and the samurai dude were the villain enemies, and this was around the time that Lynda Carter WW was in the 1940s. I think the intent was that it was Earth 2 or at least "not Earth 1".
But if is earth 2 why the newspaper of Clark is the planet and not the star,the editor is Perry and not George Taylor,and the logo is the "S" of earth-1 ?