Scharnhorst standardisation meets an early Yamato disclosure

What changes if Germany standardises capital ships on the Scharnhorst hull, develops nine-11-inch-gun large cruisers, and Japan reveals Yamato's specifications in 1939?

Germany could field more common-hull battleships and carriers, while Britain and the United States would accelerate very large counter-designs rather than pause heavy construction.

The scenario combines a common Scharnhorst-derived hull with separate nine-11-inch-gun large cruisers and early disclosure of Yamato. The common hull could plausibly produce five or six German capital ships in place of the historical mix, perhaps with six 15-inch guns, plus a small number of carriers. Public knowledge of Yamato in 1939 would force Britain and the United States to respond before their own very large designs were ready. Britain's suggested fastest answer is a crash programme for twelve-gun, 16-inch Super Lions. Only about four yards are thought capable of building ships of that scale, including John Brown, Harland and Wolff, and facilities at Greenock. The government would have to reserve their slips and transfer other work to different yards. John Brown and Harland and Wolff are especially attractive because they are farther from regular German bombing routes, though their areas were still attacked. Smaller battleship programmes could still be paused, while the Super Lions would take priority as the direct answer to Yamato. Carrier construction would continue because aircraft offer another way to slow an opponent too strong for existing battleships.