Let's start with the most surprising moments. For one, Eleven looks like a Joyce doppelganger with this new haircut.
Footage from the latest "Stranger Things 4" teaser.
Netflix
At the end of season three, Eleven went to go live with Joyce and Will. Now it looks like Joyce is raising Eleven with her same fondness for bangs.
I'm also curious about the clothes Eleven in wearing in this new footage.
That "new" outfit looks exactly like the oversized flannel shirts and long-sleeve floral top that she wore a lot in season two.
Eleven in season two.
Netflix
But back then she was hiding with Hopper (who wasn't well-versed in shopping). It's surprising to see that she's back in the same clothes, especially after her mall makeover in season three.
Netflix didn't even wait a full year after the season three finale to confirm that Hopper was actually alive. Now he's wandering around with a flamethrower in the new trailer.
Footage from the latest "Stranger Things 4" teaser.
Netflix
Hopper went from presumed-dead in the season three finale, to alive-but-seemingly-imprisoned in the first season four teaser, and now he's... fine?
Well, as fine as anyone can probably be while battling supernatural evil.
In this shot from the new trailer, Hopper looks worse for the wear as he enters a room. Is he after more supernatural creatures? Or just more bad guys?
It was also interesting that we didn't see Will or Mike in this new batch of footage.
Steve, Dustin, Robyn, Max, Nancy, and Lucas are all present in this shot from a spooky-looking hallway. But what about the other two boys?
Eleven isn't in this scene either, so maybe Mike and Will are sticking close to her. Mike is her boyfriend, after all, and now Will is something like her adoptive brother.
We also got a look at some of the Hawkins High cheerleaders, a stark reminder that all the "kids" are at least freshman in high school.
Footage from the latest "Stranger Things 4" teaser.
Netflix
Season three took place in 1985, right after Mike, Will, Lucas, Dustin, and Max have all graduated from middle school.
The final scene of that season was set in October, so presumably after they (and Eleven?) had all started high school.
We don't yet know what year "Stranger Things 4" takes place in, but it's a sure bet that they're all at least going to be freshman — if not sophomores. Thanks to filming delays, it's possible that all the characters will have been forced to age more between seasons due to the real-life actors ages.
OK, now onto the less surprising parts of the trailer. Many of the shots are very vague, like this scene of Steve swimming.
Footage from the latest "Stranger Things 4" teaser.
Netflix
He has a flashlight, so he's presumably looking for something underwater. Is he in an actual body of water? Or just an aquarium? What spooked him? We'll have to wait and see.
Then we see what looks like Max, Dustin, Lucas, and Erica riding their bikes together.
Footage from the latest "Stranger Things 4" teaser.
Netflix
Erica, Lucas' little sister, was a fan-favorite from the earlier seasons. Priah Ferguson (who stars as Erica) was upped to a series regular for season four. That means fans can expect to see even more of the best sibling in Hawkins in the upcoming episodes.
An unknown person watches a burning car in this ominous shot. Could this be Mike or Will?
Footage from the latest "Stranger Things 4" teaser.
Netflix
It's hard to say what character this is. Perhaps it's a whole new person fans haven't met yet. Either way, nothing good is happening here.
And last there was a flashback shot of Eleven in what looks like the Hawkins National Lab (HNL).
Footage from the latest "Stranger Things 4" teaser.
Netflix