After scrolling through the latest leak analysis for like half an hour, I came across the fact that the scene is actually a group action scene, apparently it was confirmed by the person who recorded it.
Something which is new to me is the involvement of Hopper, a lot of people are saying that they heard Hopper/David's voice too, and when I listened to it after keeping that in mind, that makes sense actually, in some places I can hear him.
But the new theory I've got after knowing it's a group scene is that, remember how we got a pre vis, most likely last year of Dustin, Jonathan, Nancy and presumably Steve at McCookie farm/ McCookie farm Upside Down? They were screaming, and it seemed like they were somehow dragged into the upside down. So what I'm guessing is that the group includes Jonathan, Steve, Dustin, Nancy and maybe Hopper, although it could be unlikely because the pre vis was probably of the earlier episodes but still nothing is confirmed.
And if it actually does happen, that raises one more question which is, where is Nancy? We know Nancy Wheeler, she's not the type to just sit around or be scared and hide when danger comes in, she's always there to save her friends, and if that's Steve or Jonathan, there's no question about it, she's gonna fight and scream and yell at the monsters if those try to hurt any of her friends, but we can't hear her there, what if she's already dead by then? My apologies, that statement just made me wanna throw up, maybe she gets dragged somewhere scarier, but on a serious note, no actually there's a possibility, because in the previous seasons, she always directly gets linked to danger and in the latest season since vecna showed her the prophecy, so she'll try to rescue them more than ever even if it costs her her life, and though weak at the core, still the theory gets slightly stronger by that gut wrenching, heart clenching horrified scream, which implies how terrifying and haunted the situation is.
