Though not every little fact is known about the upcoming project from Activision and Bungie (though we did post a speculation sheet a while back), whatever it is, it’s absolutely fascinating.  And today, we found two more pieces of the puzzle that fit right in.

The first is with a mysterious shirt that has appeared in Bungie’s online store, described as “an enigma from our future release”.  Though no other facts were given, it looks like the logo for the shirt reveals some sort of mysterious faction.  You can get the shirt at this link.

But the even bigger news surrounding the project is that Bungie has called upon a legendary musical figure to help contribute  -- Sir Paul McCartney.  Yep, the former Beatle listed on his Facebook page that he is, in fact, working with the team on something bold for its latest effort.

“I’m really excited to be working on writing music with Bungie, the studio that made Halo,” stated McCartney, but was mum on any other details.

So what is this explosive new project?  We’ll probably learn more…next year.