While the final 20 minutes of the show have been “locked in” for quite a while, co-creator and director Matt Duffer told SFX magazine, “We know what the ending is. It’s conceivable that it changes, but I think it’s unlikely because it’s one of those endings that just feels, and has always felt, right. It also feels sort of inevitable.”
Discussing the ending specifically, Matt told Collider, “We do feel good about this ending. I’m not super insecure. I’m insecure about a lot of things, but I feel like this ending feels good.”
And co-creator and director Ross Duffer previously revealed that his and Matt’s pitch for Season 5 left multiple Netflix execs in tears.