I'd say the chances that this game will be localized is almost absolutely certain. Atlus USA has been localizing just about every Atlus JP game these days, especially SMT titles. And Persona 2: Innocent Sin was localized after all, which also never had an official NA release.
Well then we'll wait and see... My favorite game of the whole library of SMT games is Strange Journey. And Soul Hackers looks like it's predecessor. So that adds to why I really want this game to be localized and/or translated.