Sadly enough this will probably happen. But one can dream.
I could see Jamaica (I'd be pretty okay with that, honestly - FDP and Grüne balance each other out, a bit. Though I would worry a bit for infrastructure investment). I'm not sure if the SPD even *wants* to be in the coalition, at this point. It's dammaging to the party, in the long run.
Bet with PeH:
I win if Arms sells over 700 000 units worldwide by the end of 2017.
Bet with WagnerPaiva:
I win if Emmanuel Macron wins the french presidential election May 7th 2017.