The Russo Bros ("Avengers: Endgame") are lobbying Marvel Studios to adapt the Marvel Comics title "Secret Wars", as a live-action feature including 'Avengers', 'Spider-Man', 'X-Men', 'Iron Man', 'Fantastic Four', 'Hulk' and a whole lot more:
"...the cosmic entity the 'Beyonder' is fascinated by the presence and potential of superheroes on Earth...
"...choosing a group of heroes and villains, by teleporting characters against their will...
"...to the 'Battleworld' planet in a distant galaxy, stocked with alien weapons and technology..."