#interruption

Whoever posted this new footage said they're "not breaking up" because El is smiling?

That's presumptuous of you ;)

Source

Maybe they're not breaking up in THIS scene. Or maybe they are, and making clear that things are alright between them. It's possible to be on good terms with someone you break up with. (Shocker!) And even crack a smile while you're wishing the other the best.

One really can't conclude either way. The body language does suggest honesty between them though. (Something not seen in s4.) But that honesty could be about anything.

WHAT'S MORE IMPORTANT IS THAT WE GET THE INTERRUPTION TROPE LOL:

If you ask me, this is CONFIRMATION that not everything's sunny in Mileven land. This is not a "will they or won't they?" interruption of a kiss, because they're already a canon couple. No, this is something closer to the Pineapple Pizza Interruption scene(TM) where SOMETHING the audience is WAITING to be said is NOT said:

In s4, the GA was supposed to think Mike was going to say "I love you." (Or perhaps he was going to call it off after thinking the painting was from Will? Can't say for sure.) POINT BEING: the Interruption Trope is a writing device to tease something, only to deny it. The purpose of it is to set up an IMPORTANT conflict/tension in the story that will be resolved later.

(EDIT: After writing all this I realize that there's another time interruptions happen: AFTER a scene achieves resolution. Will and Mike had one of these in 4x4 with "It looks like it'll be up to us again." "It always is, isn't it?" and Jonathan barges in. For Mike and El, the Painting Lie still needs resolution and is almost certainly related to this conversation. So everything I say here might actually not get interrupted and is actually SAID, leading to a new phase in their relationship. I just think it's less likely because any frank discussion of the Painting Lie makes a Byler conclusion too obvious. Okay, on to the likelier theory!)

Now what is this NEW unspoken thing between Mike and El? Season 4 was all about Mike being unable to say "I love you" to El. And now he has already SAID IT. On paper -- what Milevens call "canon" -- the Mileven relationship is fine and healthy.

So why prepare the audience for a NEW development in their relationship if it's not a breakup, or at least an emotional confession of some kind that threatens the last canon development that made everything "fine"?

The Painting Lie is Chekhov's gun. If this scene is indeed early in s5 (there are very few scenes with Mike and El together in the s5 teaser, perhaps she's with Mike only at the start of the season), then there's very little time for the writers to prepare something ELSE "waiting to be said" that is NOT related to the Painting Lie.

So what is being interrupted? Is it:

Mike asking if she commissioned the painting?

El saying she didn't commission it and telling Mike she thinks Will loves him?

Mike has realized the painting was from Will and is about to confess he doesn't know how he feels about him?

One of them is initiating a breakup?

WHATEVER IT IS, the Painting Lie challenges the stability of Mileven because it was core to the Pizza Freezer Confession(TM) that was supposed to tie up Mileven in a neat bow at the end of s4. The moment the Painting Lie is mentioned, this tells the GA that not everything will stay the same between Mike, El, and Will.

By the time Mike and El get interrupted, (1) the audience has already been made to expect something to come to light between them (likely related to the Painting Lie), and (2) resolution of this plot point will not happen right away and is IMPORTANT to s5.

That's because Stranger Things follows nearly 100% of all TV/movie writing in following a three-act structure. The start of each season sets up the conflicts and character motivations that drive the rest of the season. (Just as the first episodes of s4 set up El's "problem" of feeling like she's the monster and why she went on a journey of self-discovery.)

It's hard to imagine the writers setting up Round THREE of Mike struggling to say "I love you" to El. No, what's being interrupted is the next development, which has to do with the Painting Lie and its ramifications for Mike, Will, and El.

Add to this the fact that all the teasers we're getting suggest that El is separated from Mike and most of the others for some chunk of the season. What's left unsaid between them might remain unsaid. And we know that Mike and Will are side-by-side much of this season. (As promised, Mike said they will "be a team.")

Which begs the question: WHAT is interrupted between Mike and El, and what is it setting up plot-wise? Is it something whose RESOLUTION involves multiple scenes of Mike ALONE with the boy who canonically loves him and made the painting that made him feel so wonderful? Someone who Mike confessed he REALLY missed and Hawkins "isn't the same" without him?

The conflict's GOT to have something to do with Mike's feelings for Will. It FAR surpasses any other possibility, given how much set-up there has been for it.

Another plot point for season 5: on Will's end, he still hasn't come out of the closet. Doesn't part of his "emotional arc" have to include coming out to his BEST FRIEND? This is probably set up in the first episode, also.

That, together with the interruption of Mike and El, helps prime the GA to look at every scene with Mike and Will, reading every interaction and figuring out what will happen between these 2 best friends who have never lied to each other, until now. We'll even see a flashback of when they were younger. How their relationship changes after the inevitable revelations is central to s5.

The ENTIRE SEASON will be the Interruption Trope for Mike and Will, while they confront the full danger of Vecna together. It will be "the painting tucked away in Will's backpack" times a hundred.

-teambyler

(My own theory of how Byler will culminate, in case you haven't seen it!)