Russo Brothers who directed Avengers:Infinty War and the sequel said they are done doing superheroes movie unless it is Secret Wars. This was 12- issues 1984 Marvel comic book with many cross-overs.
Mattel, toy company, had a license to make Marvel toys but they wanted a storyline where all the characters have interaction with each other. Therefore, Marvel came up with an idea of Secret Wars where they pitted the heroes and villians together. The heroes (X-Men, Avengers, Spiderman, Hulk, etc) fighting against the villians (Dr. Doom, Wrecking Crew, Doctor Octupus, Enchantress etc).
It is going to be a long time if we do see a Secret Wars movie. Disney hasn’t closed the deal on buying Fox movie rights.
A recent copy of Secret Wars 1 CGC 9.8 sold for $103.75 on November 12. This might be the book to look for now if you can get it cheap.