I wouldnt be surprised, not to be mean or anything but a perfect example is the Halo series, if I'm not mistaken 3 was supposed to be the end of that series, yet there is supposed to be six Halo games, I think? I think because video games as a hobby is so much larger now and makes so much money that a lot of companies plan on multiple sequals and sometimes, not all the time, half-ass the earlier versions i.e. making games shorter in length and making DLC's almost required. I mean for a gamer why worry if a game is short you know there will be a sequal sooner or later. This is rambling a little bit, but one of my favorite games is Luigi's Mansion on Gamecube, and although I beat it every Halloween, it is really short and easy, but hey look a new one is coming out. I'm happy about it and all, but come on, if this one sells well enough expect another one.