The larger context of the battle—the U.S. Navy being forced to take on the German Navy—would have had serious repercussions for the Pacific theater. Germany was, after all, considered the primary threat, with Japan second and Italy third. A more powerful German Navy (or weaker Royal Navy) would have had second order consequences for the Pacific, delaying the Solomons campaign, including the invasion of Guadalcanal, the Battle of the Coral Sea, and even the Battle of Midway.
Despite the vast scope of the Second World War, the navies of the United States and Nazi Germany fought few, if any, direct surface engagements. By the time of America’s entry into the war the Royal Navy had already sunk or neutralized the lion’s share of Hitler’s Kriegsmarine, with only Hitler’s U-boats remaining a substantial German threat.
But what if the UK’s Royal Navy hadn’t been as successful as it was, and the U.S. was forced to hunt down the German Navy’s major surface combatants? What if the Iowa-class fast battleships had been sortied into the Atlantic to square off against their counterparts, the Bismarck-class battleships?