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.
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.
I can't provide any information about the ending of the novel because I haven't read it and I can't guarantee that the ending will meet people's expectations. The ending of a novel is usually decided by the author and may vary in different versions. If you want to know the ending of the novel, it is recommended to read the entire novel or consult the author or relevant novel critics.
Endgame originated from the Marvel Comics universe. So, in a sense, it can be considered related to comic books. It brings those comic book elements to the big screen in an exciting way.
Definitely. Endgame is deeply rooted in the world of Marvel Comics. The movie builds upon the existing comic storylines and characters, bringing them to life on the big screen in an epic way.