ME1 actually had a pretty strong ending.
Of course it's not usual to kill a character so you can ressurrect him in the first ten minutes of an installment; the death part would be the end of the first installment, and the resurrection would come at the beginning of part 2.
I'd guess they did it for the new players, and because they wanted to avoid the Reapers for the second part.
Anyway, the IT is fucking dumb Biodrone shit, of course. But for all the attention I've paid to ME lately, I only finally stumbled on the
"Beings of Light" theory yesterday, which explains the ending of ME3 conclusively, so I shall make a big-ass post about it.
In ME1 there's a planet description that states that an eccentric Volus billionaire had visions of a planet on which were buried "beings of lIght"; in his visions they told him that they had existed since the beginning of time to protect humans against "devil machines". He goes to this planet and spends a zillion credits excavating it and building a mercenary army to fight the machines he thinks are coming.
The entries describe "crypts of the beings of light":
http://masseffect.wikia.com/wiki/Klencory
Also of note is that in ME1, when talking to Wrex after picking up Liara, he will mention having done a mission for Saren, who at that point appears already indoctrinated:
http://www.youtube.com/watch?v=6QuAjnrpf64
He says the mission was in the Terminus System, and it was to hit a massive cargo freighter. Not long after the ship was taken, Saren killed all the mercenaries he had hired. Wrex doesn't go into any details, apparently getting such a bad vibe from Saren that he left without even getting paid, so he has no idea what Saren found. The idea, of course, is that Saren was out there looking for whatever the Volus might have dug up, sort of like he was doing on Eden Prime, and the volus trading vessel you find scanning was the cargo ship that Wrex attacked.
For full disclosure: Klencory is in the Kelper Verge, which is apparently not in the Terminus System.
So maybe Wrex's story is relevant; maybe it isn't. The nail in the coffin, however, is a Tweet from the Bioware community manager, Jessica Merizan, who was asked on Twitter if Star Brat was a VI:
"its presumed to be a being of light (see ME1 lore)"
So that's it. Game Over. Not if you are a baindead Biodrone , I guess, but that's it. Can't be much clearer than that.
The big question is, then: who are the "devil machines"? Seeing that Star Brat made the Reapers, who are synthetics, to save humanity, there must be
another big bad machine race out there in the galaxy-- unless one assumes that the "devil machines" are whatever machines rise up during every cycle, which seems unlikely. So there's your enemy for post-ME3 gaming.
Here's a recent article from Kotaku:
http://kotaku.com/5897486/was-the-ending-of-mass-effect-3-telegraphed-five-years-ago
And the answer to the article's question-title is:
not really. But when Bioware picked through ME1 lore for something to use a few months back while writing the ending, it made it look like they had planned far ahead.
Also, this may reveal why the ending was near-incomrehensible and why people instinctively rebelled against it:
The Klencory mission in ME3, which would explain much of this, was cut for DLC. Bioware expected players just to "speculate" over the ending, and then Bioware would sell players the solution in the form of "Beings of Light" DLC. But it didn't quite work out like they had planned.
I wonder if Bioware will include this cut Klencory content in the EC material-- assuming it exists, of course. I doesn't seem possible that, if it exists, you could sell such a DLC to players anymore. (And you sure as hell couldn't have tried to sell it a couple months ago.) From the Cerberus Base mission forward, it seems a little late in the game to go visit the Volus prophet, maybe. But it would be a sort of corollary to ME1, in which the penultimate mission was an massive ancient crypt full of folks who had fought the machines and a single being explained a whole bunch of plot shit. Bioware is big on those kinds of paralells in ME3, patterning sections of plot on the first game.
And maybe there was no "Klencory DLC". Maybe there wasn't enough time for it. Or maybe they thought a couple Codex entries would be enough to explain it all...
Anyway, there you go. "Beings of Light".