From Eurogamer.net :
An EA marketing survey detailing Mass Effect: Andromeda has leaked online.
"Mass Effect: Andromeda takes players to the Andromeda galaxy, far beyond the Milky Way, where players will lead the fight for a new home in hostile territory - where WE are the aliens - opposed by a deadly indigenous race bent on stopping us.
"Experience the freedom to traverse and explore a planet-dense but seamless open-world galaxy, rich with discovery. Play as the leader of a squad of military-trained experts in an intense third-person shooter, with deep progression and customisation systems.
"This is the story of humanity's next chapter, and player choices throughout the game will ultimately determine our survival in the Andromeda galaxy."
"There is a major battle brewing, and it awaits you. It is unfolding across a galaxy of planets, with creatures and species entirely unknown. Draw your weapon, because the fight is bigger than you thought. It's not just for your own life, it's for all humanity - the ultimate battle for a place we can all call home."

So... most of this information has already been confirmed, but we still can get a clearer image of what the game's premise is going to be.