SMT I suppose is possible to get a collection at some point. Aside from SJ and IV/Apocalypse, none of the games have gotten any recent releases, so there would probably be a good amount of interest in a full series collection.
Of course, Atlus is more likely to do individual remasters (although I/II/if would probably be grouped together).
The fact that people still think a single currently vaporware game is a good example of "caring" is bizarre. This was a series that used to get several games, to go down to 1 for years means it lost almost all the relevance it once had to the company. They don't bother even with simple ports. And I'm not doing anything besides criticizing them over it which is totally fine, not wise to put all your eggs in one basket.
Uh, when did SMT ever get several games in a short amount of time past like 1994? There was a 9 year gap (skipping over an entire generation!) between II/if and Nocturne, followed by another 6 years between Nocturne and Strange Journey, followed by 4 years between SJ and IV, and Apocalypse another 3 years later. As you can see, they've actually been putting new SMT games out faster in recent years, not slower.