This shot is so funny. Homura's all like "Hey, guys, what's up? Just crashing your magical girl team meeting for no reason, hahahaha." Also, Kyubey is there. She rewrote the whole universe and yet somehow we're back where we started with the two of them hanging out on top of a building at night.
Homura and Kyubey are on opposite sides of the beam, but Homura is in ascension (for now). Also, I really love the lighting and how it transitions from red to blue-black (and of course Kyubey is solidly illuminated by the red, while Homura is on the blue-black side so mostly it doesn't touch her).
Red seems to be "Devil" coded in this movie; it's the dominant color scheme during both the "girl without soul gem" sequence where we're seeing Devil Homura's powers at work, making everything look "hellish" or "firey" (recall Homura's name means "flame"). It is also the color associated with Homura's mirror image - cf. the evil air conditioner shots and the red and white spiraled barber poles that keep popping up, red eyes on the doppelganger, the cherry tomato aspic, etc, etc. Kyubey gets it in this shot because we already know he's evil, lol.
This scene occurs fairly early on, as the trailer makes it seem like they're discussing the "girls who aren't magical girls fighting wraiths" rumors when Homura "We're All Trying To Find The Guy Who Did This" Akemi shows up. The sky behind them is pretty solidly blue-black, suggesting that while Homura is "playing" at being an antagonist here, she's really on their side.
I thought the green lights in the background were an optical effect because Shaft loves doing those, but they are actively moving, so perhaps they are supposed to be planes? Lots of little planes, which then get replaced by one big plane later on (just like a certain big witch is made of lots of little witches)? Who can say.
Anyway, these three are Not Happy with Homura's appearance. I like how Mami and Sayaka are on alert and Kyouko is just hanging out... but she summons her spear in another shot, so it's clear they're all feeling threatened by her.
Real question: do you think Mami et al. knew that their weird classmate was a magical girl until this moment, because if they did, that scene of everyone walking home becomes even funnier. (It would explain the dirty look Sayaka sends her as she's leaving the classroom, though.)
The lighting is split here, with one side red and one side black, just like it is later in the trailer. Same idea, opposite energy. I love cinematic parallels.
The lighting is different (all red), but the poses and locations are similar enough (and you can see background specks marking the future path of the green lights in the close-ups of the trio) that this clip from the first trailer in 2023 is probably an earlier version of the same scene, just from a different perspective.
But because everything in this movie comes in pairs, the trio has what appears to be a different meeting later on - or at least Kyouko is waiting for somebody up there on that tiny little platform. I had wondered where the neon-blue cake came from, but it's probably leftovers from the bear-themed restaurant/amusement park they visit.
The lights are a mix of red and blue, but it feels like more red than blue at this point, as the Homura doppelganger's influence grows, and they're intermingled with each other rather than staying neatly on their own side. I suspect Kyouko is feeling conflicted here about which "side" she's really on and she doesn't have much room to maneuver.
Shaft has always been strategic with its use of light (see Mami and Kyouko in shadow while Homura walks in the light above), and the lighting in this movie and what it symbolizes is fascinating. I can't wait to see the whole thing in situ.