The trailer includes fight sequences from Iron Man, Black Panther, Captain America, The Incredible Hulk, The Human Torch, Deadpool and finally Black Widow. Watch them beat the crap out of the enemy horde.
Marvel Heroes is a free-to-play MMO action RPG that is going to be released for the PC. The developers, Gazillion Entertainment have previously stated that the game brings core gameplay elements from Diablo into the Marvel Universe.
Similar to DC Universe players will have the option of customizing their heroes in the departments of looks, costumes, gear and super powers. Incase you are wondering, the villain of Marvel Heroes is Dr. Doom.