Well, just to mention the Kriegsmarine ships, there would be Emden, Schleswig-Holstein, a K-classe, zerstorers, a liepzig class, etc. The Bismarck has been done already, the Prinz Eugen and Graf Spee are in the works, which means that all the hipper class and deutschland class are probably going to show up from the companies doing them. And that's just the KM.
In the Royal Navy you've got all their carriers, the Queen Elizabeth class (especially a Warspite), the three different sub-divisions of the County class, etc.
Then there are the Italian ships, which no one has done in plastic. A bunch of U.S. carriers are being asked for.
There are just a ton of ships people want that haven't been done yet. People won't buy another Bismarck kit like they have in the past right now, not with all these new untouched subjects coming out. I think Dragon might eventually put one out when the untouched subjects finally slow down, but that is going to be limited to how fast 3D modellors like me can churn them out. It will be quite a while before you would see it.