Prepare for a twist in the upcoming season of Netflix's prized 1980s-set, inter-dimensional series.
There's nothing else to the trailer, really, like a release date or more information on when we'll learn additional details about the show's return, but fans will no doubt get a kick out of it.
The theory goes: Hopper is alive in Stranger Things, but when the crew fails to track him down, he's then trained by the Russians and becomes Red Guardian, a superhero who's the Soviet equivalent of Captain America.
Stranger Things has received 30 Emmy nominations last year (with six wins) from its first two seasons and was honored with the 2017 SAG Award for Outstanding Performance by an Ensemble in a Drama Series, as well as the 2017 Norman Felton Producer of the Year Award in Episodic Television - Drama from the Producers Guild of America.
As dogs bark and officials with guns guard from watch towers, we see workers mining in the blistering cold, before Hopper - newly balded - is eventually revealed.
"We're excited to officially confirm that production on Stranger Things 4 is now underway - and even more excited to announce the return of Hopper", Stranger Things creators and showrunners Matt and Ross Duffer said.
And better yet, Hopper isn't trapped in the Upside Down-right now, anyway. That final, final post-credits scene of Season 3 is all starting to make more sense now.
How long will it take for Hopper to re-grow his hair? His death, along with all the other bad stuff that happened-including Billy's death and the death of basically half of Hawkins' population-caused Joyce to pack up her kids and move away from Hawkins for the foreseeable future. The camera focuses on one specific individual who is quickly identified to be a shaven-headed Jim Hopper, played by David Harbour.
This one...this one hurts. "We can't wait to see what the Duffer Brothers have in store when they step outside the world of The Upside Down". Give us Hopper or give us death!