AU - Lena Luthor Saves Krypton
Lena is somehow sent back in time and finds herself on Krypton 30 years before the planet explodes. Kara doesnāt exist yet. Krypton has no idea whatās about to happen to them.
Lena realizes that with her knowledge of whatās to come and intellect to devise a solution, she can do two things. One, she can save an entire species from near extinction. Two, she can save Kara from ever having to experience the pain of losing her family, her home, and being abandoned. Kara could live a happy life and never know the burden of Supergirl or being the last daughter of Krypton.
So instead of trying to find a way back to Earth, back to her own time, she settles into life on Krypton, becomes fluent in Kryptonese, and sets about with a spectacularly single-minded focus of changing the future - to save this dying world (and Kara).
She succeedsā¦mostly. They canāt fix the damage thatās already been done to the planet. Their sun will die and destroy Krypton still, but with Lenaās help theyāre able to locate a barren planet in another system that has a white star. Itās brand new, strong, and will live for untold trillions of years (provided Kryptonians didnāt try to harness its power again).
They terraform the planet and create āNew Kryptonā using the dome concept that Zor-El invented fused with Coluan bottling technology. All Kryptonians are instantly transported to their new home thatās identical to the old one save for one difference - the white sun grants them god-like powers that are beyond what Lena ever saw Kara and Clark capable of on Earth. Kryptonians are overwhelmed en masse by these powers. Some go power mad and attempt coups and form radical sects. Others realize the gift theyāve been given and, with Lenaās guidance, Kryptonian society develops under a new mission - to travel the galaxy and offer help to all those in need. Not just offering knowledge and technology this time, but themselves with their newfound powers.
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