I forgot to include a link to the design presentation that came out a few years ago. It was quite promising and lot of people (including me) hoped that the project would push through. Of course, we now know we are nowhere near an upgrade of Terminal 1. Following is a video of the redesign proposal on YouTube attributed to renowned designers Kenneth Cobonpue, Royal Pineda and Budji Layug.
I leave it to the reader to Google about new reports of what happened with the project and the bidding that was supposed to have been conducted. It’s been 1.5 years now since that proposal, and there’s certainly and practically nothing happening at NAIA Terminal 1.