Earlier this year Ryanair submitted a few offers to selected airports in Europe, precising the conditions it requires to establish its new bases there. By observing the results of the negotiations, we can already eliminate some of the potential candidates.
For example, Seville in Spain didn't met these conditions, offering only the discounts at restaurants and local services for FR pax. Carrier's answer: (it would have) "little or no commercial value for the company”. According to Michael Cawley, the discount card is a "poor substitute" for the formula presented by the Irish company to cut expenses in Seville. "No cards nor other similar article would offset the high costs that exist in the Seville airport compared with their counterparts from Italy or French or Portugal". Consequently, "I regret to inform you that your proposal does not cover us the opportunity to substantially increase our business at the airport in Seville or even establish a base of operations there." - writes Cawley in his letter to Ayuntamiento de Sevilla (the City Council).
Thus, for the time-being, Seville is out of question.
(based on Spanish-language news).