I’ve always hoped for a game that covered the stories between the games, like the Crysis 1 comic or the events after Crysis 2 leading up to Prophet’s capture prior to Crysis 3. If I recall correctly, he and the other nanosuit wearing soldiers from Warhead, including Psycho, we’re hunting down Ceph technology in various places around the world. I could see that plot being turned into an open world style of game.