Dropping clues about some important plot point in your adventure is a good way to reveal information. Because if the players work it out for themselves, they feel really clever.
And if they don't work it out, you can reveal it yourself and then point out all the clues you gave them and how clever you are for making it all seem obvious in hindsight.
Commentary by Keybounce (who has not seen the movie)
This is a beautiful recycling of a movie line. "That was no moon. It was a space station".
And turning a moon into a... mobile weapon spaceship?
Seriously, WTF is the scope of things here? Just looking at the image in the last panel - the size of the barrel of that gun, given that the moon has enough mass to have normal gravity, so the "moon" is the size of earth (is this gas giant the size of Jupiter?), we're talking... Crazy bleep scale stuff.
A moon-sized, mostly hollow space ship can actually make sense. It doesn't have enough gravity to force collapse. You can have drives inside, weapon power sources, etc.
But once you get to something big enough to cause gravitational collapse, a giant ball of metal and lava in the center, etc. - you have a massive amount of extra weight that will make it harder to move, less space to install what you want, etc. The only "good thing" about this is that you get life support/food/living space for free, and frankly, I can't see that being a good trade-off.
Looking at the details of what is "carved into" the planet, I cannot see this being stable in the face of
earth moon planet quakes (once it's no longer in orbit it will count as a planet given its size) and the concerns of erosion, etc. Heck, just rainstorms—if it's a forest moon, it has a massive water cycle and will have massive rain, right?—should erode that surface. Not to mention just the waterfalls from having that large trench.
No, frankly, I cannot see how this possibly makes any sense.
Commentary by memnarch (who has not seen the movie)
Oh snap! That's a ginormous construction! And excavation! This might be even bigger than the second
Death Star Peace Moon space station! Good thing there's forcefields and other such technology to maintain a useful atmosphere! I bet it would be quite uncomfortable outside any special built living areas though.
And it totally makes sense that Endor the Forest Moon was what was turned into the Peace Moon. Forests wouldn't be as useful for large scale commerce exchange and Nute is, or at least was, all about increasing profits. There's so much on the comic side to speculate on here from this and there's been foreshadowing for it too! I bet the ecosystem has been totally disturbed though!
Movie-wise; wow. It's seemed like Episode VII has been trying to be bigger or more impressive than any of the original or prequel movies, so I really should have expected something like this making an appearance. I wonder if Kylo Ren is going to have another temper problem and end up destroying something important with that hole that looks like a giant weapon muzzle. Maybe Tatooine will get blown up as another Episode IV parallel.
GM: Everyone ready? General Hux and Kylo Ren return to base to report to Nute’s deputy, Snoke.
GM: The base is in the Endor system. The First Order has completed the Empire’s work on the new Peace Moon.
BB-8: Hang on, what? We destroyed the second Peace Moon. Did they build another one?
GM: No, what you destroyed 30 years ago was a defence platform orbiting the forest moon of Endor.
Yanni: That huge thing wasn’t the Peace Moon?
GM: That was no moon. It was a space station.
GM: They built the second Peace Moon into an actual moon...
Rey: What moo—
Rey: Holy crap!! The forest moon is the Peace Moon!
Finn: Ohhhh... this is not good.
Rey: It’s brilliant! That’s where the Lost Orb of Phanastacoria is!