The author of the ‘Rozen Maiden’ manga (Peach Pit) confirmed in his diary that ‘Rozen Maiden ~traumend~’ Season 2 will NOT be based on the manga and instead become an orginal story on its own >_> … However, Peach Pit has decided to work with the animation staff on the storyboard and character designs, so it’s not a complete loss…

Peach Pit Diary