Arthur Hills' company, primarily Drew Rogers, designed the original 18. His company is also to design the new 9. This was originally slated to begin construction in 2018. Under the current circumstances one has to question if this will move forward.
In addition to the new 9, plans call for a clubhouse and practice range. NN was sold a few years ago to Combined Management of Massachusets, a real estate development firm. Their intention was/is to make the club private. The first thing they did was to raise the greens fee from $80 or so to $125. Purpose - to make membership more enticing.
https://newportnational.com/new-clubhouse-and-vineyard-course/