As a distant observer KIA has no chance whatsoever. You have only to look at the time taken to start up and establish STN (30 years and that was with a blank cheque and government support). It is no good to dream about future growth of air traffic and how this may be instrumental in kick starting KIA. There is still a lot of spare slots at LGW and STN with a huge infrastructure behind it so who on earth is going to wish to set up and fly from KIA. The airport has always struggled and unlike many other debveloping airports does not even boast a history of civil flights.