I would presume the mention of Cork, Limerick and Galway was a just new stations on existing lines. There have long been plans for stations at Blarney and Kilbarry between Cork and Mallow, and a P&R station on the Cobh/Midleton lines (although the site is now compromised). In Galway a station between Oranmore and Galway is often mentioned as a possibility. In Limerick there has been mention of a station at Moyross on the way to Ennis.
I donít think any of the lines to Youghal, Tuam or Foynes are quick wins as they need significant investment.
There are mutterings of forcing a rail line to be built along side the M20 to get the Greens to agree to it, but building a line alongside a new motorway seems a sure fire way to undermine it before it gets built.