It's mind-blowing how delusional some people are, and it's even more tragic once you look at the chronology of this disaster:
1. The very first info about the endings came from the leaked script. It was posted on various ME forums but at the time few believed that this is the final scenario.
2. The information from the script was first confirmed by the people who were lucky to get the pre-release version of the game (so called "Space Edition"). Even after they posted photos of their copies of the game and the first low quality screenshots from the epilogue were submitted on the Internet many either refused to believe them, or refused to believe that there's nothing more on the disk.
3. People started to research the disk for any traces of the potential ending DLC, but aside from some cut content (mostly dialogue lines) from the actual endings nothing was ever found. And this alone is very solid evidence because if anything regarding the endings was planned before the release there surely would be traces - just as there were traces and some files from the upcoming DLCs already implemented (same was true for ME2).
4. Patrick Weekes posts on Penny Arcade saying that Casey basically fucked it up and the only part of the game he's really happy about is the Tuchanka segment (personally I agree that this is the only good part of the game). Later on he requests the posts to be removed.
5. What Weeks said is confirmed by "The Final Hours" APP; there is a photo of Hudson notes regarding the endings with his famous line, "lots of speculation from everyone" (speculation whenever Shepard is alive, why did he have to die etc.). He also didn't want a boss fight with Harbinger because due to him that would be "too video gamey" (another classic line).
4. Bioware releases a statement in which they're quite clear about providing "further closure" rather than anything else. But still, some people are naive enough to believe the upcoming DLC is going to confirm the IT.
5. There are various backstage information regarding voice recording sessions and future DLC plans which also seems to confirm no ending DLC was ever planned. In fact, they had to arrange a few extra sessions for the EC and they considered charging players for the DLC.
5. The EC gets released and debunks the IT.
6. Leviathan gets released and debunks the IT even further. Also, still no traces of the "true ending" were ever found within the DLC files.
8. And here we go, 2 years later and some people still beating that dead old horse.
Overall, there's not a single piece of data that would back the IT or that it was was ever even considered by the devs - quite fucking opposite. The theory was created by a bunch of desperate fans who started to connect completely random pieces of the plot, lore, sounds and codex entries, and it's not the first time something like that ever happened. The most ridiculous, though, is the assumption that Bioware, after all the shitty retcons and retarded decisions the pulled, SUDDENLY put some INTENTIONAL plot holes in the game and planned such a complex conundrum leaving subtle hints all over the game.
/
the dude cant possibly be that bad.
Apparently he can.