My idea is for two legendary skins for Leona and Diana, Solar Eclipse Leona and Lunar Eclipse Diana (similar to Nightbringer Yasuo and Dawnbringer Riven). Solar Eclipse Leona could be something similar to the link listed, with black armor outlined in white. She could represent a corrupted Leona that believes in bringing back worship of the Lunari. Similarly, Lunar Eclipse Diana could have orange armor outlined in black, corrupted into believing in the idea of the Solari. With these both being legendary skins, they could have all new voice lines detailing their new dynamic with each other.