As much as I suppose I should be fan-raging over this leaked information, I actually don't give a damn. It's odd for me really, since I've been such a hardcore Mass Effect fan from the start and I've come to care about the characters and what happens to them.
Here's how I see it:
I never wasted any emotional energy hoping for a specific ending for my Shepard or any of his teammates. Sure, I may have had small hopes or wishes that this or that would come to pass, but as the Mass Effect trilogy is very much a game whose story unfolds based on a player's decisions and abilities, to expect that Bioware could possibly account for ALL contingencies and give everyone the ending they want is, quite frankly, outrageous.
That being said, I do concede that there should be more than just two or three canned endings that occur no matter what you do during the course of the game. And honestly, I don't believe in the slightest that the leaked spoilers represent the absolute end-all, be-all of every possible decision made throughout all three games. You can look at scripts and game files all you'd like, but until you put it in the context of a full playthrough on all possible options, you're not selling me on that belief.
And you know what? Even if the endings are correct and real, I'm not going to work myself up into a spittle-flecked rage over it because there was never any guarantees. A happy ending was never assured; hell, there was not even a guarantee of a moderately pleasant ending. Sure, we hate to think that an epic story could end in such a dreary and hopeless way, but sometimes even the best possible options can lead to the worst possible outcome. We're not entitled to anything; I don't care how much time and money you've spent. If you actually think you're entitled to the best possible ending, you need to adjust your expectations, because you're only setting yourselves up for disappointment.
I want to see it all played out; I'm not going to rely on spoilers and leaked screenshots and other such nonsense to tell me whether I'm going to like this game or not. I'd like to give myself a little more credit than that.
Also, as a little postscript to my little screed here...
Did anyone yet consider the possibility that they're leaving the story open for a continuation in some form, either in a post-game DLC, Mass Effect 4 or a Mass Effect MMO? I know that seems a bit like grasping at straws, but we were told to hold onto our savegames from ME3; there had to be a reason for that.
I don't know...just trying to keep a "glass isn't hopelessly empty" viewpoint on things. If I'm wrong, oh well.