Maybe this one will be a standalone to set us up in Andromeda and if successful they will make three more games, aka the Trilogy for Andromeda after the success of this game.
They are probably testing out the waters with MEA. If this one is to be the first of the trilogy I do hope they plan it out. I also don't mind the choices that we make in game but I think they should do a website voting for the sequels with what choice will make canon ending or canon in a sense so newcomers can come into the series. But maybe less major decision choices in the game if they do make a trilogy so its easier to keep track of what choices go forward and which don't. They could also do nods to some of the small choices if the story demands it in the following games. But they need a system to better track the choices we make.
I know people don't like canon endings but it might be something we should ask for so it is easier for them to move the story forward too.
Well ... people seem to love to have the illusion of making choices that "matter", and want all those choices be relevant and adressed in sequels...which was the undoing in my opinion of the trilogy.
With Dragon Age they almost got the same problem, but mostly avoided it by having each title a new protagonist, and taking place in some different spot of Thedas. The advantage? You can simply ignore many things or leave them "ambigous" or unclear.
And that route I am rather sure they'll not only continue with Dragon Age (Next game will probably have yet another protagonist, and take place in Tevinter), but use for Mass Effect as well from now on. It just leaves Bioware with more freedom to do what they want to do. Especialyl if there is a larger ingame-time-gap inbetween each game.
I also think that every game nowon will have a canon-ending that will be used as the groundwork for the next game. How we achieve that ending will be the differences and all. But drastically different endings? Noone should expect this anymore. And surely they'll never advertise with those as well ^^
Time will tell if I am right, or if Bioware gives in to a possible demand by fans to have more "Ryder" - but maybe a third approach would be possible (though not likely): Larger DLC/addons for Andromeda or even "spinoff"-games.
Like Mass Effect Andromeda 1 , 2 3 etc telling each the big stories about the colonization of the galaxy, each with centuries in between. And have somewhat "smaller" games inbetween. Smaller in scope, tighter in story and focused more on the adventures of the characters introduced in each new "main"-game, to satisfy the need fans might have for more of their Ryder and all.
Think of the concept of the Star wars anthology-movies - "smaller" stories/movies (yeah, I hope you know what I mean with that), while still having that huge trilogy telling the new main story.
Sadly DA2 was received too poorly by many fans (unjustly in my book), as it was pointing into that direction already, or at least could be used as a template..just done better in the details