You should keep your Mass Effect 3 saves

We already know (from Bioware's producer Michael Gamble) that Mass Effect 3 will be the last game where we will meet the commander Sheppard.

But it seems that Bioware is preparing us something because the same producer said that the players should keep their saves from Mass Effect 3 safe.

We don't know for now if these saves will be needed for a DLC or they will be able to be used in another Mass Effect game.