Hahn
Yes, there is talk in the local press around Hahn. However, nothing is official yet. Domestic German flights are obviously hard-hit by the new air-tax, which is 8 Euro per one-way flight and due to it being domestic, VAT is added, all-in-all 19 Euros on a return fare. This is on top of the 19% VAT we anyway have for all domestic flights. Berlin is the only domestic flight from Hahn. Lubeck was tried, but short-lived. Hahn already had plenty of especially UK routes chopped, also Polish and Hungarian (Budapest now served by Wizz). Berlin is 3 times a day, which to me always seemed excessive, as all surrounding airports also offer Berlin. Ryanair's route network from Hahn already is so rationalised that I'm personally not too worried about its future. Plus they keep threatening, people in the region get a bit tired of that.