Well, Mary Jane would be one of the most affected. She has a deep emotional connection with Spider - Man. Ned, his friend from school, would be lost without him. And then there's J. Jonah Jameson. Even though he's often against Spider - Man, he might feel a strange sense of loss. Also, any villains who had a sort of twisted relationship with Spider - Man might also be affected in some way, like Venom or Green Goblin.
Well, often in 'ultimate spider man death fanfiction', the theme of heroism in the face of death is prominent. His death might be a result of a great battle against a powerful villain. It also might explore the concept of mortality, as Spider - Man, who seems so invincible at times, is now gone. And his death could lead to a new hero rising in his place, which is another possible theme.
Maybe he fakes his death to protect his loved ones from a powerful enemy. He could be trying to draw out a villain who has been targeting his family and friends.
It could be the Green Goblin. He's always been a major foe of Spider - Man and might be the reason for Spider - Man to fake his death, like if he's planning a huge attack and Spider - Man needs to deceive him to stop it.
Well, in the Ultimate Spider - Man game story, it's all about Spider - Man's adventures in the city. There are intense battles. For instance, when fighting against Electro, Spider - Man has to use his agility and web - slinging skills to dodge attacks and then counterattack. His relationship with Mary Jane also plays an important part in the overall narrative, adding an emotional depth to the story.
The story arc where Gwen Stacy becomes the Carnage symbiote host is also great. It added a new and dark twist to the relationship between Peter and Gwen. It explored themes of power, love, and corruption in a very interesting way. This story really pushed the boundaries of the Spider - Man mythos in the Ultimate universe.
One idea could be a crossover where Ben Tennyson and Spider - Man team up to stop a common enemy like Doctor Octopus who has somehow gotten his hands on some of the Omnitrix's alien DNA. They could combine their powers and skills to outwit the villain.