- last post: 01.01.0001 12:00 AM PDT
Hey, it's the Ark, of course. Cortana said something in Old/New Mombassa levels about the Covenant not "Expecting us to be here". This implies that the Covenant was searching for something. And what were the Covenant searching for at the end of Halo 2? THe Ark. So, it makes sense that the artifact they found on Earth was the Ark.