That got me thinking about where Finn might get the kyber crystal for his lightsaber, and I’m particularly taken with the idea of him taking crystals previously used for evil and changing them for his own use. My previous thought was that he might get one from a defeated Knight of Ren, or even get his hands on an old Sith lightsaber, and purify the tainted crystal like Ahsoka did.
Another source of kyber that would be fraught with meaning is Starkiller Base. SKB used to be a planet with a large kyber crystal deposit, which the Empire mined for the Death Star and the FO later used when they turned the planet into a superweapon. Now, SKB may be destroyed but kyber crystals are evidently stable at the pressure and temperature at the core of large stars, so chances are the crystals themselves survived though they may have drifted far away from the force of the explosion. What if Finn were to find a crystal, or be drawn to one, and made his ‘saber from that? He was once stationed on SKB, and there would be a lot of symbolism in his turning a weapon of mass destruction to a force for protection.
If we speak of destroyed planets with a large kyber deposit, of course, we can’t leave out our old standby Jedha. Idk how much kyber there would be left after the Empire strip-mined it, but chances are there would be enough left over for lightsabers. It’s also interesting in this context that Wadi Rum, one of the shooting locations for IX, was the location of Jedha in Rogue One. I mean even if IX includes a return to Jedha the landscape would be significantly changed, to put it mildly, to the extent any Jedha scenes shot in Jordan would have to be dressed up a lot in effects or might be better off shot against a green screen in the first place. Still, it’s an intriguing possibility and I would dearly love both an acknowledgment of Jedha’s devastation and its treasures--both mineral and spiritual--turned against the Empire’s successor.