New Ultimate Skin: PROJECT Hunter Rengar.
What's not to love about this idea? With all the PROJECT hype going around, it only seems natural that there would be one who loathes the PROJECTS with a burning passion. Rengar in my mind seems to fit this role nicely as he goes around, hunting the newly augmented champions giving him greater challenge. He could have special quotes or interactions, or both (because why not? Its an ultimate.) when he slays a PROJECT skin. They could also integrate something that worked like his old passive where if he kills a certain amount of PROJECT skins, his model changes to flaunt his victories. I really feel like an idea like this would have a lot of potential.