One common theme is power dynamics. Since both Malekith and Loki are complex characters with their own forms of power, fanfictions often explore how they interact in terms of who has more control, or how they use their powers in relation to each other.
There's a fanfiction called 'Malekith's Allure for Loki' where the author explores how Malekith's dark and mysterious nature attracts Loki. It's full of tension and some really well - written dialogue that makes their interactions very engaging.
The Avengers originated in Marvel Comics. Marvel has developed a vast universe of characters and storylines, and the Avengers are a key part of it. Their adventures have been adapted into various forms of media, including movies and TV shows.
Captain Marvel is Carol Danvers. She gained her powers through an interaction with alien technology and has become a powerful hero in the Marvel universe.
Marvel justifies Marvel Comics 1000 by presenting it as a celebration of their rich history and a platform to introduce fresh and exciting story arcs. It could also be a strategic move to attract new readers and reignite the passion of long-time fans.