Oh I thought of a minor DC character who would have multiple ways of springing up in this story-
Olivia Reynolds, the world's most infuriating toy marketeer!
She likes to market action figures based on superheroes. I could see it now- Orange Lantern, with giant cake accessory! Teekl and battleform Teekl action figures.
She's also a bisexual who has a thing for superheroes, since she's been a love interest for both Hal Jordan and Ice maiden, Tora's predecessor among the Global Guardians.
She's the one of two known possessors of the Umind, which powers an entire alien civilization. The other one being Aleea Strange, Adam Strange's daughter. Note that the alien civilization is entirely powered by Olivia, if something were to happen to her, then they'd move on to Aleea as their energy source.
Despite the theory that her umind might be the anti-life equation, reading her storyline, it actually seems her power comes from a different source.
"Hunger and fear and pain. Love and joy and the thrill of battle. And deeper. Deeper than emotion. The power that makes my heart beat." Plus Hal increasing Aleea's umind power by giving her some of his green lantern energy.
I don't know about anyone else, but that sounds to me like a Umind taps into the entire emotional spectrum, including life.
Fortunately, or unfortunately, depending on your point of view, it's vulnerable to an extreme version of the centipede dilemma- The human mind is capable of handling this much power, so if a human knows they have this power, it goes away, so Aleea and Olivia can only access it in altered states of consciousness.
Interesting.
The point about the Darkstars - yeah, they definitely cannot make a lantern themselves, then. They might be able to with the Ophidian on hand, instead of the Orange Central Power Battery - but that won't help with making a Green Lantern, now will it?
I was under the impression that the Controllers were part of the civilization that designed the original rings and had the relevant notes, although I suppose I only assumed that they were Orange-preferring.
Krona built the power glove that was the prototype for the green lantern rings, the map to the Orange Central Power Battery (which kind of implies he made it), and kept all the emotional embodiments as pets before the Guardian/Controller split or the Guardians leaving Maltus for Oa.
So they should have the scientific basis for understanding emotional technology, but they have never been shown using it, in the comics, anyway.
In the comics the closest they've gotten is the Miracle Machine- A machine that turns thought into reality, a technology that is even more impressive than the rings really. The Miracle Machine was capable of making an emotional embodiment of hate, who was going to use the miracle machine to wish all the entire universe.
