Got confirmation from ViaVision that this is Region A compatible along with The Prisoner set and The Blind Swordsman.
I own the South Korea Nova Media Director's Cut and just posted a review. I decided to wait for a 4K update of both cuts rather than ordering this set. My luck would have been to order the set and then a month later a 4K version would be announced.
https://www.blu-ray.com/movies/Hero-...6/#UserReviews