There are several platforms where you might be able to find Endgame fanfiction. Archive of Our Own (AO3) is a popular site that has a vast collection of fan - created works, including Endgame fanfiction. FanFiction.net is also well - known and likely to have a good number of stories related to Endgame. Additionally, some Tumblr blogs might also share or recommend Endgame fanfiction.
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.