After jumbling up all this New And Invigorating Halo Information, and watching Halo Legends, Specifically "The Baby Sitter", I have pieced together the Origins of the Unidentified Ruins.
Now, apparently Humanity was once a Great Space Faring Race, and those Ruins looked awfully like Asian/Japanese/Forerunner Ruins.
I think Humanity visited that planet or Originated on it.
We are finally learning what we've always wanted to Know.
And after some Thread Hopping, I have noticed some dissolution in the fine woven Net of Halo Fanatics. Some reject this new information and now hate 343i for allowing this Arbitrary Plot filler to be written.
Now, Now, Heed my message, to be a True Halo Fanatic, you must love and Respect (or at least Tolerate) everything that comes from the Creators and Fabricators of our Beloved Universe.