This is what has been discussed with senior leadership team in a meeting with airlines and 3rd parties. September was the date set to start the work. I'm not going to post the documents on here so you will have to just wait and see.
MAG I'm sure would of rather waited for the new arrivals building but they're aren't enough check-in desks anymore and the airport will struggle this summer in regards to that. STN is 5 years ahead of their operational planning in terms of pax figures. They would not be able to handle a new reasonable sized airline with the current landslide facilities, if their flight time wanted to be from 6am to 2pm