https://www.cbr.com/netherrealms-mar...ng-game-leaks/

The character list for the game includes, "Captain America, Thor, Iron Man, Black Widow, Hawkeye, Wolverine, Black Panther, Spider-Man, Groot and Rocket (duo character), Blade, Gamora, Moon Knight, Ghost Rider, Gambit, Shang-Chi, Kitty Pryde, Invisible Woman, Mr Fantastic, Hulk, Skaar, Doctor Octopus, Blob, Mojo, Bullseye, Mephisto, Daken, Arnim Zola, Venom, Abomination, Deacon Frost (and) Madam Masque."

Beyond that already bursting roster, u/Comicconthrowaway also mentions that Deadpool will be offered as a pre-order bonus. The first DLC pack will reportedly include Daredevil, Cyclops, Raiden and Kylo Ren (of the Star Wars franchise).