Even if Cork does get the June airbus, I don't know if we'd see that many new routes. Capacity increases on current routes would use up a lot of its time. Amsterdam would go to double daily for the summer programme as well, considering the loads and yields over winter at that frequency. Paris would probably go up to 10 or 11 a week. In summer, Faro, Rome and Malaga could also take extra seats.
Assuming that it doesn't come (and not getting the June one would mean no short-haul expansion in Dublin for over a year), I would guess the Warsaw flights from last winter would be filled a couple of times a week with Faro, leaving only two for other routes. Seeing that Budapest and Geneva are operated from Belfast at present, they must be possibilities.