Freighter potential
They'd certainly be very welcome; currently, DUB only has one long haul cargo route, to SIN, but HKG is ideally placed - as if you didn't know already! - for North Asia and this is a key focus of Irish trade efforts; there are very ambitious plans to develop trade links with China, Japan, Korea and basically, the whole of Asia and a HKG link would be a very good step in that direction.
The only slight downside is that the runway is a bit on the short side - 8,650', so it's going to need a few en route stops before HKG.