User blog comment:TheMegaShyGuy/Halo 4 RvB Easter Eggs/@comment-2135507-20121016023108/@comment-2135507-20121016152105

Maybe Blood Gulch is on a Ring, and when they moved to Valhalla in Halo 3, that was the other planet they were talking about. All of the Halo 3 Maps (In RvB cannon of course) Are on the same planet as Sidewinder.

Then again, that raises the question "How did Sarge drive there in Reconstruction". and to that I saw. PLOT MAGIC.