Etihad Airways to begin flights from Scotland - The Scotsman
This is the article which has indeed suggested ABZ could be in line.
That said I think the imminent service is surely going to EDI most likely on an A330.
The one in 5 years may well be ABZ, possibly on an A320neo which should manage the 3100nm journey direct. EY have their A320s configured with a rather low density (136) although I believe currently their longest A32S sector is to Belgrade.
Not holding my breath on this one. Personally I would prefer a TK IST service which seems more realistic and ABZ seems to fit their strategy if connecting Secondary European markets where a widebody is overkill.