Reach had DLC maps on Halo Rings, and Installation 03 is seen in mission 7.
ODST and Wars are the only 2 that don't really have Rings. Besides, I'd bet that we go back to 03 or 05 in Halo 5. Or go searching fro the lost Installation 07. --- It's powered by a forsaken child?! Might be, kind of. I mean, I didn't use the whole thing!