Here's my prediction:

CDU

Will stay relatively stable or lose a bit of votes, won't gain

SDP

Will stay about the same or lose votes, won't gain

AFD

Will stay about the same or gain a bit, won't lose votes

Greens

I think they stand to gain the most. They won't really bleed votes, they could only lose far-left votes to Linke if that electorat thinks they compromised to much. On the other hand they may gain some votes, most likely from SDP and Linke who will see them as the only option to influence a right-wing neo-liberal dominated government.

FDP

I think they'll be the most divided party, on this. I can easly see why some would like what they did ''they stood firm'' and all that. But some of their electorate can easly see this as ''irresponsible'' and so on. And if rumours are tue and Linder wants a minority government, then some will accuse him of wanting the power but that he's afraid of the responsability.

Linke

i think they'll stay about the same.