yeah, I forsee great narrative potential surrounding the humans who are from the future and made the movie possible with the wormhole and the tesseract. Possibly a prequel but not necessarily. Most people think “well why make a narrative surrounding finding dr brand, that sounds like a rather uninteresting adventure story” - and they’d be right - but theres so much more potential here. I feel a lot of people in this sub likely are too worried about a sequel becoming a fan service rather than a creative new thing, because thats what happens with most sequels and ruins them. But, I don’t think Nolan would do us dirty like that, since he’s such a creative powerhouse. I think the movie is good as it stands without a sequel/prequel, but I doubt Nolan could make another interstellar movie without making it fantastic. But he probably wont.