Marvel’s Avengers developer Crystal Dynamics has explained the length of the upcoming superhero game is “comparable” to the studio’s Tomb Raider titles.

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Initially, talking to Comicbook , senior brand director Rich Briggs said, “We're not putting exact numbers on it just yet, but you can expect something comparable to what we've done in the past.” He alluded to the campaign's length by referencing the kind of hours you’d expect to get out of a Crystal Dynamics game: “If you think about previous Crystal games, you know that if you want to be playing your way through the core story, it's going to be in that area, 10 to 12 hours. But if you want to see everything there is, and do all the side missions and everything else, you're generally looking at 30 plus hours in the Tomb Raider games."Briggs noted that this relates specifically to the game’s launch content. “And then, of course, you have the extended narrative and the extended game plan, more heroes post-launch," he had added.IGN was able to get a clarifying comment from Crystal Dynamics, indicating the long life span planned for the game. “Marvel’s Avengers has an all-original, core campaign narrative comparable to previous Crystal Dynamics games. The numbers quoted were for Rise of the Tomb Raider; as we are still in development we have not yet finalized the exact number of hours for the campaign in Marvel’s Avengers. This is the most ambitious game Crystal Dynamics has ever developed, and in addition to the main campaign narrative, we’re crafting stories that will take fans on a journey over the course of multiple years.”With that in mind, we could be looking at around 30 hours to do Marvel’s Avengers’ solo campaign and playthroughs of all of the co-op War Zone missions. However, what the original quoted numbers didn't take into consideration is the fact that Avengers is a live game with areas that are, presumably, meant to be played through numerous times like other multiplayer experiences. The “extended game plan” could mean anything, including in-game events, which would add further playtime. If Avengers is set to be anything like Destiny or Diablo, then a single playthrough of its content is just the start of your potential time with the game.At NYCC we discovered that Ms. Marvel will be a playable character in the game , and that she’ll also act as the campaign’s protagonist. We also got a peek at every character and both their finishing moves and alternate costumes

Matt Purslow is IGN's UK News and Entertainment Editor. You can follow him on Twitter