Would depend on Atlus to bring this game back, but if they do so, they would need to overhaul the entire game, since its progression is mostly related to heavy grinding, including late game quests (And I really mean HEAVY grinding, like, doing the same dungeon 50 times to get an item for a quest that you get from clearing the boss room). Without counting that the game eventually turned pay to win, even on the japanese servers.
Other than that, was quite cool to play dungeons on it, and also catch demons and try fusing them to get new demons to have skills, and make the ultimate demon for your party. But the game was also quite hard too, which is cool.