That would suggest a major shift in business model.The bullying of "in the middle of nowhere' airports to seduce them into believing they have a greater status than reality might be over. Will they be able to extract the same 'fire-sale' deal from the primary airports? If not will their pricing structure be viable?
Compare the airlines to the supermarkets. Lidl & Aldi are doing well, but they are in cheaper locations. If they move into the city centre they will reduce profits and have to cross subsidise from their out of town places. Will RYR do that or will they demand a certain profit from all their routes?
Why would they give on the business model that brings them success and try and do the major airport to major airport when they are the ones that in many airports across europe have developed a market which didn't exist.
Lets face it before Ryanair started flying to Carcassonne, who knew where it was and who flew there, same with many airports. Ask the tourist boss in the town what would happen if no flights to the airport.
Adding primary airports when you have another 100 plus aircraft coming makes business sense.