Where is the Aurelion Sol skin coming out?

tired of seeing a bunch of champs repeatedly getting skins after skins but Aurelion Sol has yet to get his rightfully deserved skin and its very aggrivating to see other champs get nice flashy/non flashys skins. Sol may not be a very popular champ but he is very good and has a really comitted and fanbase or mainbase. show some love to the only star dragon you have