Miles Morales is juggling his life between being a high school student and being a spider-man. When Wilson "Kingpin" Fisk uses a super collider, others from across the Spider-Verse are transported to this dimension.
This movie contains 33 potentially triggering events.
Contra one of the other posters, not all of the other spider people are bitten by spiders - Spider Ham is shown to be a spider who was bitten by a radioactive pig.
The first Spider-Man we see is severely injured in an explosion/building collapse but is actually killed by Kingpin. Kingpin is HUGE and "crushing" is about the only way to describe how he kills Spider-Man.
There’s a part in the movie where Miles falls off a building and a flash drive is shown breaking in his pocket as he hits the ground. However, it’s easy to mistake this for him breaking a bone due to the cinematography.
Characters from the alternative dimensions experience seizure-like “glitches†in which their bodies convulse and recolor while making a loud noise, but the experience and pain seem to be brief.
When Peter B. Parker is being pulled behind the train with Miles his face is dragged against pavement. He looks up and opens his mouth and is missing several teeth. This is fairly easy to miss however as it is in the middle of a very busy sequence and it is played for comedy as his teeth are fine moments later. Characters are also hit in/wipe their mouths often during fights, indicating some damage, but none graphic.
(Spoilers) No actual ghosts, but there's a scene towards the beginning of the final battle between Miles and Kingpin (on the train, when it enters the collider beam) where alternate versions of the latter's late wife and son flicker in and out that are reminiscent of ghosts.
Peter B. Parker is readily willing to destroy the supercollider at the cost of his own life, even after Miles offers to do so instead. His reluctance to return to his own dimension can be read as semi-passive suicidality.
It's a major feature of the movie, complete with glitch effects. If unstable realities are highly scary/triggering for you, avoid this movie altogether.
[SPOILERS] Some of the scenes, however, such as when Miles first gets his powers and is at school/ when Miles sees his uncle as the Prowler, though, are somewhat reminiscent of anxiety attacks. It is, though, in the long run, not major.
No, but many characters mention another character's weight, and he doesn't seem really happy with it either. Said character is not fat, and those scenes are meant to be funny.
Apart from the main film, the very beginning's logo flashes are similar to a strobe effect. It's the only bit of the film that triggered my migraines, which strobe lights usually do.
The Spider-heroes’ backstories are all told via them relaying their backstories to the audience. In only one instance (or three instances told at the same time technically) is there actually someone in-universe they’re telling their backstory to.
Miles runs through a busy street twice at the beginning of the movie but the cars all stop in time. He falls onto the top of a car from great height and dents it majorly, however nobody is harmed. Another scene shows a car being thrown at and immediately punched back from Spiderman.
No significant blood/gore, though characters are visibly bruised and battered during intense fights and small amounts of blood are shown (such as a few bloody noses.)