There might be a fanfiction where the Avengers, instead of fighting Thanos in the way we saw in the movie, they actually manage to outwit him before he can even start collecting the Infinity Stones. They form an alliance with some unexpected allies from other galaxies, and together they foil Thanos' plan. This shows a different side of the Avengers' strategic thinking.
One idea could be exploring what if a minor character from the movie got the Infinity Stones instead. For example, a random Asgardian warrior. They might use the power in a completely different way, perhaps trying to restore Asgard rather than the more universal aims Thanos had.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics, including Avengers and Infinity War. Just search for 'Avenger watch Infinity War' in the search bar, and you'll find many stories.
One interesting fanfiction could be about the surviving heroes trying to reverse the effects of the Snap in creative ways. For example, they might discover an ancient magic that can bring back the vanished ones without the Infinity Stones.
One interesting Avenger - Hydra fanfiction could be about a scenario where a Hydra agent has a change of heart and secretly helps the Avengers. This could add a lot of intrigue as the Avengers are initially suspicious but gradually come to trust this former enemy.
One interesting Avenger lice fanfiction could be about how the Avengers deal with a lice outbreak in the compound. Maybe they use their super - powers in unexpected ways to get rid of the lice. For example, Thor could use his lightning to zap the lice away.
There could be a fanfiction where the entire Avenger cast gets transported into an alternate universe where they have to act as their characters in real - life situations. So, Robert Downey Jr. as Iron Man has to actually build his suit and save the day in a world that's a mix of the real world and the Marvel universe.
One interesting Avenger Bolsheviks fanfiction could be about the Avengers adapting Bolshevik ideals in a post - apocalyptic world. They might use the principles of equality and shared resources from Bolshevism to rebuild society.
One interesting story could be about the 7th Avenger having a unique power that no one expected. Maybe they can control time in a very different way compared to Doctor Strange. This new power adds a whole new dynamic to the team and the battles they face.
There could be a fanfiction where an Avenger goddess teams up with a less - known hero. They embark on a journey to save a small town from a mysterious threat, and in the process, she discovers new aspects of her powers and herself.
One popular Infinity War fanfiction is 'Aftermath'. It explores what happens to the characters after the events of the movie in a really engaging way.