Etihad
I doubt that Etihad would pull out from Dublin if it started services to Belfast were The taxes are higher. I can see Etihad serving both Dublin & Belfast. Etihad wouldn't leave Dublin see as how it has a sponsorship with GAA there and Etihad are increasing their presence in The Republic. Etihad Dublin-Abu Dhabi is still performing exceptionally well now that it has competition with Emirates to Dubai.