to listen to Daft Punk is a good one.

So if Guardians are the resurrected ghosts of dead people, then perhaps the current human guardians died mostly intact or were recovered for an honorable burial.

Then you could gather the Awoken were humans who were completely consumed by the darkness, and changed.

Then you could speculate, the Exo's human bodies were destroyed, leaving them to need new steel, everliving bodies...

So you could say.....

The Exo's are.......

Today's dumb joke brought to you by Paddy industries

Bad joke aside... where are we getting that Guardians are resurrected people? Is it just the "Shake it off. We've all been dead before?" and the Ghost's "I've been searching for you for centuries?" Is there any more?

Because if that's it I'd say its still highly inconclusive.

For the actual question, I'm definitely interested in the nature of the Exos, and moreover how and when we'll find out what they are (beyond some kind of combat machines) and how and why they were created.
Since we're getting off topic right off the bat and being a little, not silly exactly, but getting into other things, I'll say they showed a promo for that movie Lucy in front of the video, and the premise (a drug made her able to use more than 10% of her brain, which makes her able to do various barely connected impossible things) just makes me so frustrated and annoyed, and I'm really disappointed and frustrated and ticked off a scientifically-minded person like Morgan Freeman is supporting this by being in it.