http://www.kokpit.aero/200-senaryo
https://www.dunya.com/sirketler/tava...-haberi-377744
you can use google translate to read what is being written, the first one is an interview with the IGA airport operations CEO, he talks in detail about how the move will happen. and the second one is about the compensation issue with TAV until 2021.
the airport is 60 percent complete so I also think its ambitious to open it october next year, but I also don't think they will open and make a slow gradual move there that will last until 2021.