Want to hear Halo 5's soundtrack before it releases?
If I got a dollar for every time I wrote about a leak this year, I could afford a copy of Halo 5: Guardians. Which is all the more appropriate, seeing as Halo 5 is the latest game to accidentally leak something to the world at large. An update got sent out to the now defunct Halo 5: Guardians beta that came with Halo: The Master Chief Collection and included fifteen minutes worth of Halo 5's soundtrack. Most notable is the returning theme from the original game, remixed for the latest Halo game.
I strongly advise you watch it while you can, as the original upload (according to the repost's description) was set to private not too long ago. Still, for a little time, you can appreciate some of Halo 5's new composition. As a series fan, I have to admit that it sounds like a welcome return to form after the more minimalistic Halo 4 soundtrack.
For those who'd like to compare the new remix to the original theme, here's Halo: Combat Evolved's main theme.