Juliette has been given power now and Adalind finds out she is pregnant!! This should be stepped up with her pregnant by The Grimm , as well as Juliette, (at the same For longevity, Adalind backs off for now to protect her secret Grimmchild and Juliette openly embraces her pregnancy, causing dissension and struggle for her relationship with The Grimm and Sgt. Renard. In the future, these two babies can be shown coming from good and bad sides with powers developed by the writers and not yet found in Nick's books.
I have more ideas but this is the beginning of a good long running series. See the future and make it happen.