On the new moon map i figured out some of the easter egg for it, third or fourth room there is a diaomnd thing in the ground that looks like a launcher, you need all four players because on the diamond there is a tablet with four squares. One of which has a space to put the golden rod on. And the foucusing stone in the middle. Power must be turned on...
I just found out another thing... As seen on both the shangri-La and moon loading pages there is a temple being sucked into a black hole of some kind, and is seen on the moon loading page floating through space. Also on the loading page you see it somewhere on the moon, now the escavators are also a thing that can be turned on. When all of them are turned on they lead you to that. Now I think that Ricthofen is after something in that temple...