Throughout the series, Cecil, Donald, and the GDA are spying on the Grayson family from across the street, which could be taken as stalking in a sense.
The character of Omniman turns out to be a ruthless villan with very nefarious intentions, but he hides this from everyone during most of the first season.
Also, the character of Amber ends up gaslighting Mark by prettending to now know he's a superhero and still getting angry at him(tho this is more sloppy writting than anything else)
Episode 7 at 29:41 (trigger phrase “you wouldn’t dare), a shockwave either injured/kills many small rodents and birds. Only the birds are shown to be dead. A scorpion is crushed to death earlier in the series also
Monster Girl briefly mentions that because of her young body, she only gets romantic advances from boys going through puberty or people who are registered sex offenders. No pedophiles appear in person, and Monster Girl is not sexualized.
There are several scenes where the main character gets beat up pretty badly, making his breathing laboured. The main character is also unable to breathe in space, but this does not get brought up a lot.
Spoilers for the Atom Eve special episode:
The antagonists are highly deformed, have exposed muscle and organs and can morph their limbs in a grotesque looking manner due to experimentation.
throughout the show there are a few moments where hands get broken/squished/cut, but none of it is directly on the fingers. there's a few scenes where feet are squashed by large heavy objects/creatures but again no toes are shown and it isn't directed at them.
a couple of people are dropped from high places throughout a few episodes, some are saved but there's a lot that aren't. just generally be weary of this.
Seen in episode 8. (Spoilers) Mark attempts to save a mother and her child from a falling building, but the building falls on all three of them. No body or gore of the child is seen, but her death is heavily implied as she is not seen again and her mother was crushed.
One minor villain has a focus on correcting perceived shortcomings of the human body. A fairly major plot thread involves a disabled character trying to obtain a new, non-disabled body.
A character specifically asks another character not to prevent their planned death in episode 7, even if not direct suicide a warning seems appropriate.
it isn't confirmed if they die or not in season 1 but a character gets into a life or death situation where they don't come out very well in episode 6. they don't come back to the show after this and are only mentioned maybe once or twice.
A disabled character's body is treated with disgust by other characters in one scene. On a meta level, their body is portrayed very grotesquely in the art style similar to the way the gross-out gore is, and [SPOILERS] the character chooses to die rather than continue living in their disabled body, which could definitely be a triggering plot point to someone sensitive to ableism.
Darkwing is depicted as a black man in this series, but he's not one of the first characters to die a gruesome death. Likewise, Black Samson gets horribly injured in the fight against Battle Beast, but he recovers.
a few of the teenage characters are seen making out on a bed, a few characters are caught in the shower together implying they were doing sexual things but it's not shown. its implied that Omni-Man and Debbie are having sex in one episode but it isn't shown at all either. mainly just noises. none of it is graphic.
a few cars are thrown at heroes and villains throughout the show, a story is created in episode 5 where a main character uses "being hit by a bus" as a cover for what really happened to him.
Animated blood and gore feature prominently, especially (but not exclusively) during action scenes. Expect *large* amounts and a *lot* of detail
Skipping gory scenes is not a viable option, as many of them are critical to the plot
Once you learn to expect any and all violence to result in gore, you may be able to look away beforehand. That said, the aftermath will often be be visible for multiple shots and the show often cuts to it later with little or no advance warning
Blood and gore will also appear in the recaps at the starts of episodes with even less advance warning than usual
Be careful