As Ryanair have a base in Malaga they havn't yet decided if the aircraft to operate DUB - Malaga flights will come from there Malaga Base or there Dublin Base. I would give it about 2 - 3 weeks as I was trying to book flights to Pisa and I was able book the outbound but not the inbound. Around 3 weeks lather I was able to book in both directions. FR are in the middle of putting there winter timetable up on there website.