Licensed games almost always suck, as they are rushed(to coincide with the release of something in another medium. That's strange, seeing as how this follows the movie continuity(rendering any history behind these moot, as they don't already know each other, there's no 'it's you!', it's all 'who are you?', and confusing newcomers unnecessarily), and will not only attract, but appeal more to, people who got into this franchise(of hundreds of mutants) by virtue of the films. It's also something that only fans of the comics will even know what is, as with several characters, an organization and various details in this.
Set between the two sequels(note that it spoils the first two pictures) and setting up the third movie(.well, kind of), this has the team go back to Alkali Lake and discover something down there they weren't expecting.