N7, human, command of a ship, the only person who can save the galaxy(this will happen).
Yeah, nothing like Shepard at all. 
So besides a few mobile off-shoots we've had one protagonist for ME games. I am confident that for future installments that most if not all major protags will have an N7 background like a MAJORITY of star wars protags across books, movies, and games are jedi. are they all the same?
If you want an RPG with a semblance of freedom in the order of missions you do or where you go etc etc you're going to be the one in command of your ship/party/group. If you are not then the entire game is going to be as linear as as CoD because the player doesn't have a choice.
the character will most likely be human for the ease of animating the human animation skeleton. Let's have them get a decent female walking animation before we up the ante to other species.
only person who can save world/galaxy. This is too broad of a thing to call shep 2.0. With this it can be Master Cheif 2.0, vault dweller 2.0, Marcus Fenix 2.0. Goku 2.0, Mario 2.0, Luke 2.0, Inquisitor 2.0, Jedi Exile 2.0, DO I NEED TO GO ON?