Marvel VS Capcom Infinite has a lovely Story Mode demo out that showcases the game and is free for XBO and PS4 users. The game features all your favourite characters from the Capcom and Marvel universe trying to take down Ultron Sigma, a literal fusion of Ultron from the Marvel Universe and Sigma from Mega Man. Through the demos you get to fight as Chun-Li, Thor, Captain Marvel, Sir Arthur, Captain America, Dante and a few others.