Air Adriatic announced that it will start flights from Zagreb and Split to Berlin (unspecified airport),Hamburg and Dusseldorf two weeks from now (on 13th DEC).
No details were given on frequency yet.
I couldn't find any confirmation of this on any of the airport websites.
They will be flying so called "worker flights" with ticket prices starting at 180 Euros.
Will this happen is not so sure.
They have already announced many flights that they didn't start flying.