One great fanfiction could be 'The Unseen Heroes in Endgame's Final Battle'. It might focus on the lesser - known characters during that epic fight. Another could be 'A Different Perspective on Endgame's Climax' which perhaps shows the battle from the point of view of the civilians in New York. There's also the fanfiction 'Endgame Final Battle: The Alternate Plan' that could introduce a unique strategy in the battle that the Avengers could have used.
There are also some Reddit communities dedicated to Avengers fanfiction. Subreddits like r/AvengersFanfiction might have posts specifically about the Endgame final battle fanfiction. You can also try using Google search with specific keywords like 'avengers endgame final battle fanfiction' and it might lead you to some individual blogs or smaller fanfiction websites that host such stories.
One highly regarded story is 'The New Beginning' which explores what happens after the events of Endgame in a really unique way. It delves deep into the characters' emotions and how they cope with the new world they're in. Another great one is 'Beyond the Snap' which focuses on the alternate timelines that could have been created during the events of the movie. It's really interesting to see how the author plays with the concepts from the movie.
Another option could be Tumblr. There are many Tumblr blogs dedicated to Marvel and Avengers in particular. While it's not as organized as the dedicated fanfiction platforms, with some searching, you can come across some interesting Avengers Endgame fan - written stories.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfiction on various topics, including Avengers watching Avengers Endgame. There are also some fanfiction sections on dedicated superhero forums where fans share their creative works.
A really cool plot idea could be that the Avengers are watching Endgame in a sort of 'alternate reality cinema' where the events in the movie start to bleed into their real world. So they have to stop the movie from fully playing out to prevent chaos in their own universe. This would involve a lot of action and strategic thinking as they try to stop things like Thanos from emerging from the screen while also trying to understand the significance of what they're seeing in the movie.
Well, it could be a huge all - out battle against the League of Villains. All the heroes, including Deku, Bakugo, and the rest, team up to take on Shigaraki and his crew. Maybe they fight in a destroyed city, with the heroes having to use all their quirks and teamwork to defeat the villains once and for all.
There's a chance that side characters get more focus too. Maybe characters like Rhodey or Nebula could have more in - depth character development as they react to the events of Endgame while being watched by the Avengers in the fanfiction.
Well, one interesting thing could be the characters' reactions. They might have different emotional responses seeing the events of Endgame unfold in the fanfiction compared to the movie. For example, Iron Man could show more internal struggle as he witnesses his sacrifice again.