Siliconera reports that it has first details on the fiction of Dead Space 3, claiming that the next entry takes place on the planet Tau Volantis. The planet's "white-out blizzard conditions" may trade the blackness of previous Dead Space games for pure white, a new method for keeping the beasts of Visceral Games' horror franchise well hidden from view.
Those beasts, according to Siliconera's mole, are known as "the hive mind" in Dead Space 3.
EA and Visceral are rumoured to be already hard at work on Dead Space 3, but none of this is official yet.
More rumoured details on the story, potentially spoiler-ish, at Siliconera.