I haven't delved too deeply into it yet but I believe KP comes with a game editor.
Therefore it should be possible (correct me if I'm wrong!) to create new scenarios from scratch from other theatres of war without waiting for a new release.
I know that Rob Gjessing's and Chris Merchant's website [url]www.wargamer.com/wachtamrhein/[/url] has tutorials on how to use the editor.