Seljuk - I think it is extremely unlikely that Ryanair will be doing anything at ZQW airport, if only because the airport made many of the staff redundant at the end of 2014 after the airport went bankrupt.
Places like DUS and MUC are very different to PAD, KSF or ERF. Despite the public statements about moving FR away from middle-of-nowehere airports to big city airports, the airline's actions don't always follow this idea (e.g. new base in the Azores suggests FR remains driven in part by opportunism and not entirely long term strategy), so I'm hesitant to say what type of German airports will pick up FR service.