It seems that Digimon World: Next Order might be heading west as the game has been rated by the Brazilian Advisory Rating System for the PS4.
Although there is no rating for the PS Vita version at the moment, this does not mean that we only get a newly created PS4 version in the west. Digimon Story: Cyber Sleuth also had ratings first for the PS4 and later for the PS Vita so it’s still likely that the training RPG is coming to both PS Vita and PS4 in western territories.
We still have to wait for an official announcement but the rating is a good indication that Bandai Namco is working on a localization.
Digimon World: Next Order was released for the PS Vita in Japan on March 17, 2016.