One possible plot could be that Mary Jane gets caught in a dangerous situation where Venom's black tentacles are being controlled by an evil force. Maybe she's lured into a dark alley and the tentacles suddenly wrap around her, restraining her movement. She then has to use her wits to try and escape or call for help.
It could be Eddie Brock himself if he loses control over the Venom symbiote. His darker side might take over and use the black tentacles to target Mary Jane for some reason, like she might have something he wants or she stands in the way of his plans.
A good non - adult plot idea is that Mary Jane discovers a way to temporarily suppress Venom's more violent tendencies. She then tries to train Venom to be a force for good in the city. Or perhaps Mary Jane is accidentally exposed to a small part of Venom's symbiote and gains some minor powers, and she has to figure out how to control them while also dealing with Venom who is both intrigued and a bit jealous of her new abilities.
Perhaps it could be about Mary Jane's baby having some sort of special ability or gift. And the story would revolve around protecting the baby from those who might want to use the baby's power for their own gain. It could also show how Mary Jane discovers this ability and comes to terms with it.
In this fanfiction, it could be that Kari is exploring an ancient, cursed place. As she ventures deeper, black tentacles emerge from the shadows and start grabbing at her. These tentacles might be a manifestation of the curse. Kari's journey could then be about finding the source of the curse and breaking it to stop the tentacles from attacking her. She might meet other characters along the way who either help or hinder her progress.
One possible plot could be that Kairi is in a strange and dangerous realm where the black tentacles belong to some sort of dark entity. She has to use her courage and any latent powers she has to try and break free. Maybe she discovers that the tentacles are being controlled by an old enemy who she must then defeat in order to escape.
Yes, there are many non - adult Mary Jane Watson Venom fanfictions. You can start by looking on fanfiction websites like Archive of Our Own. Just use the search terms 'Mary Jane Watson' and 'Venom' and filter out any inappropriate content tags.
One possible plot could be that Peter and Mary Jane are happily married. They discover Mary Jane is pregnant and they start preparing for the baby. Peter has to balance his superhero duties with being a supportive husband, like making sure he's there for Mary Jane's doctor appointments while also protecting the city.
Perhaps in a fanfiction, there is a magical anomaly that fuses Naruto's world and Mary Jane Watson's world. Naruto and Mary Jane find themselves in a strange new realm that has elements of both universes. They have to work together to find a way back home. Along the way, Naruto teaches Mary Jane some basic ninja skills like how to move stealthily and how to sense danger. Mary Jane, in turn, shows Naruto the glamour and art of the theater world. Their friendship grows as they face various challenges in this mixed - up world.
One common theme is the idea of an unexpected alliance. Since Venom is usually seen as an antagonist, a fanfic might explore how he and Mary Jane could team up for a common goal. Another theme is the exploration of Venom's complex nature in relation to Mary Jane. How she reacts to his dual - nature of being both a powerful and dangerous entity.
Another plot twist might be that Mary Jane discovers that the Black Cat has been working undercover for a good cause all along, but has been framed as a villain. Mary Jane then has to help clear her name. This would turn the typical perception of the Black Cat on its head.