It only took me 3 or 4 game sessions to complete the main storyline. When I completed it I was like "what ? already ? But when I started playing, I was only at 15% or so of the game ?". But when I think about it, I played something like 5 hours each time, so it really took me 15 to 20 hours to get to the end, and I still had 40% of the game completed. I got to say though, it looks like they rushed the end a bit. I was disapointed that you can't *SPOILER* visit properly the area around the Wonder Tower. I"m a bit skeptical on the Joker dying... *SPOILER*.I'm enthusiastic on the sequel they'll make though. The "prophecy" told by Azrael is promising, I'm hoping for a "Batman : Gotham City" with the whole Gotham City available, some kind of GTA-like or say, Assassin's Creed-like Batman. You'd take the batmobile, patrol in the streets, etc... With the gameplay and the design quality they put in those two first games, that would be the best superhero game ever ! As for Arkham City, I still have to complete the Hush secondary misson, and I believe I still have one to do with Freeze too. Then, getting all of the Riddler's trophies, to free all of the hostages, but I doubt I will get them all.