First the teaser trailer:
And details from the devs:
But for people who can't watch the whole video here are some bulletpoints:
-Is a remake of the first game, rebuilt on Frostbite
-Working with fans of the original games in order to ensure the overall "feel" of the original Dead Space is left intact
-Will still include some gameplay improvements, for example the devs are looking to make the zero-gravity gameplay more like Dead Space 2
-3D audio to enhance the horror experience
-Devs are aiming to make the game 100% seamless, with no visible loading screens during normal progression (such as the tram load screens)
-Will still stick to the canon of the original game
-NO MICROTRANSACTIONS. The devs at Motive are fully aware of how this was a major complaint people had with Dead Space 3 and are ensuring the same mistake won't happen again.
-Dismemberment system could be enhanced in some ways (like maybe dismemberment that's more nuanced)
-Combat will stick to the Resident Evil 4 "action survival horror" style of the original rather than the Gears of War esque approach of DS3