- last post: 01.01.0001 12:00 AM PDT
The Covenant are the least worrisome to have found Earth. It's the Flood that is the next biggest threat should they find Earth.
Supposedly, only the ship's captain has the authority to initiate the databank wipe. Since Miranda was not present at the time, and if the Flood quickly overran In Amber Clad, then yes, they do know.
I doubt Regret knows the coordinates to Earth. Sure, he may have found Earth, but that depends whether he remembers a series of jumbled coordinates... It's Cortana that truly holds Earth's location. And if Gravemind got ahold of her, which he did...
MC the outcast defender of Earth? That's a pretty good thought.