Marvel Comics was a group of superhero comics created by Marvel Corporation, including the Avengers, Spiderman, Iron Man, Thor, Captain America, Black Widow, Hulk, Thor, and the Avengers. These comics were set in a fictional universe and told the story of superheroes protecting the earth and stopping evil forces. Marvel Comics had many fans around the world and were widely used in movies, TV series, games, and other forms of entertainment.
In most cases, the Dark Crystal comics are considered canon. They expand on the story and lore established in the main storyline, adding depth and detail to the universe.
Well, the status of the Dark Crystal comics as canon is a bit ambiguous. Different interpretations exist within the fan community. Some think they seamlessly fit into the overall lore, while others believe they deviate too much from the core story to be truly canon.
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.