They are trying new and diverse environments to keep things interesting in this game. The Sprawl makes the Ishimura look tiny, the Sprawl is an "organic, haphazardly constructed, long-term place that's built around the remaining shards of one of Saturn's moon-The first planet-crack ever. Like any real city it is not all built by one person. Some stuff was built up, and some areas, corporate areas, government areas, and public areas." That Ian Milham guy (the art director of Dead Space) sure knows his stuff. Anyways, we'll be going through shopping malls, schools, churches, and a lot more. They also say since it was a more public place, a place where people lived, there won't be a bunch of hallways and locked doors this time. Not saying there aren't, of course, just also a good change of environment. And Isaac won't just be coming to a dead land, he will be seeing the infection from the very beginning. He's there when the outbreak begins, and he's there when all the panic and terror begins to strike the ship. Apparently they want to go with a strong sense of watching the outbreak get worse and worse and more and more people dying and more and more Necromorphs showing up the further you get into the game.