Joe Stalin had some great plans and models of Battleships—that were never built. Smaller Drone carriers would be a good idea, Once we get the rail guns perfected—Monitors might make a comeback—or even fast battleships. The Russians toyed with half-airplane/half ships a while back—maybe that’s what is needed. We need to think 21st Century, not WW II.
The Soviet “Ekranoplan” was a half ship half aircraft meant to land an invasion force super quick. It was one of N.S. Khrushchev’s harebrained schemes that was quickly defunded when he was deposed.
We’ll need to think of something that’s 21st Century, or at least see what the Chinese are experimenting with, as they seriously intend to become a global seapower.
Then there’s always the world’s muzzie problem. No carriers needed to fight that, just some civilizational will to survive.