I didn't think they would continue it. EA claimed several months ago that they would need to sell around 5 million to continue the franchise. With the direction they were taking the series I really didn't have much hope in it.
"In general we're thinking about how we make this a more broadly appealing franchise, because ultimately you need to get to audience sizes of around five million to really continue to invest in an IP like Dead Space. Anything less than that and it becomes quite difficult financially given how expensive it is to make games and market them."