Carson's appeal was always just as the cameraman for his friend's interactions. I think a lot of his remaining supporters will quickly realize that they were never actually a fan of Carson, but rather of Carson's content.
He was the person who always was the coordinator of everyone and got them all together in one place, but he was essentially playing the role of a Reaction YouTuber in his videos/streams. Without that friend group to prop him up I don't think he'll get much farther after the initial burst of support surrounding his return. His support will never die off completely, but he'll only have a fraction of his former popularity.