During the elaboration of the famous Plan Z, there were supporters of an alternative Kriegsmarine with much more aircraft carriers as the heart of their fleet. But they couldn't answer the question how these carriers could reach the Atlantic Ocean without the aid of powerful battleships, so they kept relying on huge BBs like the H-Class. But this happened in late 1938 and not a single ship of the Plan Z was finished during the war. If the commander of the Kriegsmarine was a genius like the generals Guderian, Manstein or Rommel, who knew that tanks will change the warfare completely, he possibly would have started building aircraft carriers in 1935 with a design much like the japanese Hiryu. Simple, big enough, easy to build and fast. And would be clever enough to build ships which could easily be converted in carriers to avoid suspicion. And, most important, modern purpose built aircraft and no Me 109 T or Ju 87 with all their flaws. But Admiral Raeder wasn't a genius and no one did know how to build a carrier so it went the usual way.