Ger Cork->While most of us would love to see those routes, you need to remember that this is a business and a route can only survive if it can make money.
In that respect, you need to look at the volume of passengers, whether they are business or leisure, the equipment that airlines have available and the airport at the other end that you're considering flying to.
Even if SAS noticed the existence of Cork, I can't see how they could make those routes profitable. Similarly, you'd have to question whether a service to a slot constrained airport like Frankfurt can generate the volume to justify occupying a slot there (it's worth noting in this regard that there is speculation on the Dublin thread about the future of Dublin-Frankfurt with them). I'd also struggle to see the demand for more than one North American destination (at least in the immediate future). Maybe Boston and New York both at 3x weekly, but that's about it.
As Brian said, if you count CityJet as Air France, they are more of a possibility. In fact, if there's any airline that the airport needs, it's probably CityJet.