Posted by: Fatgezzer724
From an educated point of view its either:
1.
A station like high charity. Look at this
On the left side of the photo, looks similar no? There are Forerunner Fortess worlds that are described as looking similar to high charity.
2.
A shield world.
If you've played Halo wars you would have the the Spirit of Fire entering the shield world through a giant circular pit just before it crashes into the Covenant glassing ship. This could have a decent storyline. The shield world could be onyx, where other Spartan II's like Linda, Kelly and Fred are based(they were all members of blue team with john).
Either way, I think they shouldn't have made Halo 4. Halo 3 was subtitled "Finish the Fight" for a reason.
They aren't fighting anymore, they're just trying to get home.