As far as I can see in the newspaper article the CEO of FMO said only that an "established international airline" would run the route; nothing about Aer Arann. The reference to them seemed to be from rumours on various aviation forums.
I think it will be Aer Arann, either in their own right or under a franchised brand, but it's still a bit early to be talking of it as being definite. Remember Jetisfaction?