Lets take a look at MEA a bit. What we know, only official confirmed word of god stuff:
- game is in a new galaxy (we don't know how we get there or why)
- protagonist is human male/female
- takes place long after the trilogy
Now, if
1) No save import, endings ignored, Andromeda colonists leave before endings, they don't know what happened. - Speculations for everyone forever. Artistic integrity. Biggest trolling in video game history.
2) Save import exists (or Keep style app) and we hear of face value literal endings - IT disproved
3) Save import exists (or Keep style app) and we hear of indoctrinated traitor Shepard / Shepard resisted and he's a big goddamn hero - IT confirmed
MEA will clear things up.