They have been promoting on FB for a while now. I saw one of their B767s at IST back in Dec.
So far they seem to have got their heads screwed on so time will tell. There was talk at the start about A3 links but then it all went quiet.
Whatever they do they need to make sure they offer a decent service which will make the Greek Diaspora and tourists alike ditch the usuals and hubs to travel to Athens and vv. Doing that and making a profit will be tough but I wish them luck anyway as it would be nice to see a stable Greek airline with key USA/Canada routes.