New Skins for Update
I know there are going to be two new skins for this update, one being for Renekton and one being for Hecarim.
Many have already seen the spoiler for the Scorched Earth Renekton Skin, and if you haven't already, here is a link. http://na.leagueoflegends.com/node/11116
That leaves, however, there is going to be a Hecarim skin. I am not sure what it will look like or the release date, but do believe me when I say there will be a new one. I have found an algorithm for who will get new skins for each update. So, when a new update comes out, I will find which new skins will be available.
I also believe there will be some changes for Urgot and Shen and Vlad
I'd love for Hecarim to get a new skin. He's an amazing champion who only has two good skins; Arcade and Headless Horseman. Arcade, is nice, but gets old kinda quick, and Headless Horseman is available only on Halloween.