It could be that after a big battle, Tony is presumed dead. But then he shows up alive, much to Pepper's surprise and joy. She is over the moon. They talk about how they've changed during the time apart and reaffirm their love for each other. Tony might even promise to be more careful in the future for her sake.
Maybe Tony has been lost in space or some other difficult situation. When he finally makes his way back, Pepper is waiting at the Avengers compound. Their reunion is filled with emotions. Pepper might be a bit angry at first for him putting himself in danger, but then she realizes how much she missed him and they share a passionate kiss.
Their relationship could become stronger. After being apart and facing the possibility of losing each other, they might cherish each other more. They could start to be more open with their feelings and communicate better.
One possible scenario could be that they meet in a familiar place, like the old NCIS office. They might exchange some witty banter at first, just like in the old days. Then, they could start reminiscing about their past cases together.
Another storyline could be that they get involved in training the next generation of superheroes or tech - savvy individuals. They realize the importance of passing on their knowledge and skills. Tony could teach about advanced engineering and Pepper could offer her business and leadership expertise. This would be their way of ensuring a better future for the world.
One interesting scenario could be that Pepper and Tony are promoting a new high - tech Stark Industries product. Tony is being his usual flamboyant self, showing off all the amazing features while Pepper tries to keep him on track and add in the practical details. For example, if it's a new type of energy - efficient suit, Tony might be flying around demonstrating its mobility while Pepper explains how it's cost - effective and environmentally friendly.
One possible plotline could be the daughter inheriting Tony's genius and getting involved in some high - tech project at a young age. For example, she might build her own mini - Iron Man suit.
Maybe the writer wants to explore an alternate view of Pepper's character. They could be showing that she has flaws and isn't the perfect partner all the time. It could also be a way to introduce new characters into the story in a more impactful way, like the person she cheats with.
Overcoming challenges together is also a big theme. Whether it's dealing with a new supervillain threat or internal issues within the Avengers, Tony and Pepper often face difficulties side by side. Fanfictions explore how their love helps them get through these tough times, and how they grow both as individuals and as a couple.
Differences in ideology can also play a part. Tony might have some views on how to handle threats or use technology that the other Avengers don't agree with. Maybe he's more willing to take risks with untested tech that could endanger the team or civilians, which would lead to resentment.
Perhaps in the fanfiction, McGee wears Tony's clothes as a joke among the team. The others initially laugh but then notice how different McGee looks and acts while wearing them. It could lead to some humorous banter and self - discovery for McGee.
It could be that Tony is under some sort of mind - control or influence that makes him cheat on Pepper. Then the story might focus on Pepper's journey to break the control over Tony and save their relationship.