Nord Deutschland
As you can see, it is called Nord Deutschland. It is planned to cover the following sections:
Hamburg hbf - Hamburg Altona - Elmshorn - Itzehoe.
Hamburg hbf - Hamburg Altona - Elmshorn - Neumünster - Kiel
Hamburg hbf - Hamburg Altona - Elmshorn - Neumünster - Rendsburg - Flensburg - Padborg.
Two Screnneshots from the routeeditor: