Peter may try to get Tony's attention back. He could show off his own skills or achievements in an attempt to remind Tony of his value. For example, he might go on a solo mission and do an amazing job, hoping that Tony will notice him again.
I'm not sure of specific 'tony ignores peter fanfiction' off the top of my head. But you can try searching on fanfiction platforms like Archive of Our Own. There are likely to be many works there that might match what you're looking for.
Maybe Tony has a special interest in Harley in the fanfiction. His focus is completely drawn to Harley, so he ends up ignoring Peter. It could be that Harley has some unique qualities or abilities that Tony finds more appealing at the moment.
One common theme is adventure. Peter is often depicted going on exciting journeys in different settings. Another theme is self - discovery. He usually learns more about himself during his experiences in these fanfictions.
Yes, there are likely some out there. You can try searching on fanfiction websites like Archive of Our Own. Just type in 'Peter jealous of Harley' in the search bar and see what comes up.
Well, it could severely strain their relationship. Tony might feel betrayed and hurt. He could start to question Steve's loyalty. Since Steve is ignoring him for Bucky, Tony might become resentful towards both Steve and Bucky. It could lead to a rift that's hard to mend in the story.
Peter could stand up to Tony. By showing his strength and not taking Tony's meanness lying down, he might earn Tony's respect. For instance, if Tony makes a snide comment, Peter could give a smart comeback that makes Tony see him in a new light.
One aspect to consider in 'possessive Tony and Peter fanfiction' is the nature of their relationship. It might explore themes of protection. Tony could be possessive in a way that he wants to keep Peter safe from the various dangers in the Marvel universe, like powerful villains.