my thoughts on this:
IF the movie is going to be good, while being based on the origional story, here are some things that I think are going to need to be done.
Budget: HUGE, we need a ton of CGI, cotsumes are great but we'll probably need it for Krogans, the reapers, geth (I don't think anybodys head could fit into those flashlights). thats not even counting biotic and other effects
Story: the writing needs to be as good as, if not better than the game's, writing will need to be a centerpiece of this, it always has been for Bioware when it makes its games, why should a movie be any different?
Casting: with cgi and other things, they'll be able to keep many of the voices from the games if they choose (Tali, Legion, other things that arent human. ELCOR SPECTRE FTW)
Cutting: Mass effect is a long game, fitting all important events in will be impossible: so stuff must be cut, I say you cut either Noveria or Feros out, probably feros, and make Noveria alot faster moving. You could easily learn some of the things you learn on feros on other planets at the same pace. In mass effect 1 movie, cutting characters may not be as big of a deal.
Morality choices: if the movie is based on Shepard (which i think it will) it needs to have shepard following a heroic path (paragon), but, he needs to still be a badass (renegade), so what I think is that in many situations that make him a badass and not an evil basterd (killing that one asari on feros, for instance) he should do it. But when the chips are down and its fairly clear b/w good/evil, he should choose paragon
final thoughts on mass effect 1: It has alot of potential, and if the directors and others can get it right, they can have a powerful franchise going.
Mass effect 2:
(Assuming mass effect 1 is a success in the box office.)
Mass effect 2 was much more character driven than the other one, its entire story was about getting ccharacters, by the end, you have about 10-12 characters (12 if you have zaeed and Kasumi). and then of course you have loyalty missions. for this one, the director and others are going to have to be more creative with who and what they cut.
Characters cut and left in: In my opinion, the dlc characters are out, no offense, but they aren't really important. That leaves us with ten characters, still alot, and way to much to get a good backstory and development going. SO sadly, some will likely get cut. my choices to be cut would be Samara, Grunt, Thane (sorry), and maybe even Jacob (but the prize...). this leaves us with six supporting characters, making it alot easier to flesh them out in movie-form. Also, we will be able to include more loyalty missions (probably not all of them.)
other thoughts: now maybe, you could keep more of the characters and loyalty missions if you divided the movie into two parts, just a thought. THERE MUST BE TURIAN FINGER-QUOTES.
Thougths on both of the movies:
Love-interest: this one may be very difficult to decide, should there not be one in ME1 and wait until ME2, or the other way around, with Shepard remaining faithful. Its would be difficult to decide, also, transpeicies is also a difficulty (Im pretty sure that Tali romance is more popular than miranda, but Im not sure,) the directors may decide to keep it human x human for the viewers sake, or they may go where ever they want. but I'm pretty sure they'd go human x human when it goes to love interest.
choices:
just a list of important choices that should happen throughout the stories (pretty much in order)
ME1
. Shepard saves the Rachni
. doesn't kill Wrex
. sacrifices Ashey (this may change if they want shepard with a racist)
. Causes Saren to kill himself in final battle
. saves council
ME2
. allows veetor to go with quarians
. lets miranda talk to sister
. keeps genophage data
. keeps garrus from killing sidonis
. keeps jack from killing that one guy
. Tells the quarian fleet not to go to war at trial
. reactivates legion
. rewrites geth
. destroys collector base
hopefully i didn't miss to many big choices that could affect later
I hoped you liked this, specualticve post.
Wrex. Shepard.