Something isn't right here. The track "Sark (extended) " was a song that was being spread around the internet awhile ago as part of the Tron Legacy soundtrack, but was eventually revealed as a song by some independent artist. It's very odd how themes from it are incorporated into the main theme here. I would be very quick to call this fake, but it seems that this is Daft Punk's official soundcloud. What's going on here?

Didn't even think of that possibility. Figure sound cloud would be all over a fake daft punk profile that claims it's official. But it very well could be. I'll edit original post and add the possibility it could be fake.

I too find it difficult to believe Disney would allow DP to not only post tracks with spoiler-esque titles, but to post tracks (even if only demos/WIPs/ideas) at all. I don't imagine they would allow much to be given away, and this couldn't even be passed off as a leak/ "a little gift from Disney."

As I mentioned earlier, this is the song that an exert of is used for as the track "Sark (Extended Version)". This was done by an independent artist name Pilotpriest and was originally passed off as part of the Tron Legacy soundtrack shortly after End of Line was heard at Flynn's Arcade at ComicCon, around when a bunch of fake soundtrack songs started popping up: