We all know that actually trying to complete Plan Z would have been national suicide for Germany on many levels, militarily, economically, and psychologically.
But what about the battleships called “Stalin’s republics”?
There were plans to build 15 of them, each almost as large as as a Yamato or Montana class battleship, although with less firepower. Only four were laid down (and only one was more than 20% complete) when Germany invaded the Soviet Union. After the war, all were scrapped. A similar fate met the Kronshtadt battlecruisers before the war.
Another naval project were the Stalingrad class battlecruisers. Originally designed before the war, the project was revived as aircraft carrier escorts after it. The project only advanced with Stalin’s backing, and his death led to all the ships being cancelled.
Given that the Soviets only barely completed their Kirov class light cruisers and the struggle on the industry to build even a small part of Stalin’s republics, would it have been harder for the Soviets to build this fleet or for Germany to build Plan Z? And if the Soviets succeeded, what would the impact on the war have been?
This probably assumes Germany doesn’t invade the Soviet Union until later.