Katsuragi wakes up in May 1942, a month ahead of the BATTLE OF MIDWAY aka the turning point of Pacific War. Zuikaku wakes up in May, 1945, long after she was sunk and not far from the defeat of Imperial Japan. That's gonna be interesting. Though I think the best way for Katsuragi to save Zuikaku would be to blow up the Emperor first and deflect to USN.