There are two layouts presented. One resembles semi-circle Terminal with 2 runways in between similar to Incheon T1 without the two piers. The other is linear with only one runway. The latter assumes SMC failing to secure airline relocation contracts from either PAL or CEB. San Miguel doesnt want Don Quixote out of Bulacan.
There is no final structural design for the terminal as we speak as they are waiting for that contract to be signed. Information about that could be available as early as November. By that time, layout could change again as they are capacity dependent.
Why this is important?
A domestic airline making this airport home brings about 10-18 million passengers in 2025 with premium and exclusive parking positions and plenty of expansion possibilities on it. That alone justifies building a 25 million capacity terminal for one airline in just one roof on opening date. Add to that a couple of international carriers joining them. That basically secures viability of the grandious project investment wise.
Take note, there is no government guarantee, ie force relocation like Bangkok, Incheon, Tokyo, and the like. It should be the airlines choice. If no airlines commit to fly there SMC wont even bother to build the first runway.
AAP contract and smaller arlines would make this airport work together with a single runway and a smaller linear PTB similar to T3 but that won't be enough. It needs more traffic to the tune of 5 million to make it viable which I think is doable given MNL constraint. It is also not as capital intensive as the former demanded. Its return however is comparatively low and with that its development. If we know by then which contract they secure will we know which direction they are heading.
The bright side, Chinese and Korean carriers interest to fly Bulacan is lining up. And these are A320/B737 operators. Middle east-based airlines are also wanting to operate at this airport offering up to 20 flights daily. This should spell bad news for Clark, Cebu and Davao. A contract however similar to that asked by a domestic airline also require them to build airport express train to Bocaue junction or on the way to Metro Manila on opening date or they wont sign at all. Tough job for SMC, yet nobody is mentioning about it. DOTr is currently working with SMC on the express train spur as they are not in the plan for NSCR. They better do it fast as Changi airport in Clark is also courting these carriers to fly CRK instead.
On a lighter note, this should be fun to see.