SACrIGGER
I dont know if your aware but Cardiff airport fairly recently completed a buisness survey of desirable routes and if i remember correct Aberdeen finished top. So you would think this route would become a reality. It has been operated succesfully before. Flybe and eastern would probaly be the likely carriers if it did happen and you will probaly find out soon with flybe releasing there summer schedule.
Inverness i have no idea.