Though it was rumored that Tangerang Line could be the airport rail link, I didn't think that the new line would branch from Tangerang Line. In my opinion, The railway from the Soekarno-Hatta Int'l Airport to Jakarta City Centre would be built independently from Tangerang Line, because Tangerang Line has poor transportation capacity such as single track.
Though double tracking is underway on Tangerang Line, I'm afraid that How to transport passengers from Duri, the terminus of Tangerang Line, to downtown of the city.