The new free-to-play mobile RPG by FoxNext Games, Marvel Strike Force, pits the player's team against the alien warlord Ultimus and his Kree soldiers, who allied themselves with Hydra and AIM. The list of playable Marvel characters includes Spider-Man, Groot, Loki, Elektra, Hulk, Doctor Strange, and many others.
https://www.notebookcheck.net/Free-to-play-mobile-RPG-Marvel-Strike-Force-now-available-for-Android-and-iOS.293342.0.html