Arcade Diana Skin
I'm quite ill at the moment and my drawing skills on a good day aren't good enough to make something I would be comfortable sharing BUT.
I feel like her toolkit has pretty amazing potential for an Arcade Skin (I knowwww they're releasing quite a few of them and with final boss veigar it seems like he'll probably be the last of the set) BUT.
One can always hope.
Her Q is pretty easily self explanatory. Giant rainbow Q that looks digital and awesome? Easypeasy.
Her W gives her three floating mini buff icons.
Her E does a giant spiral explosion of rainbow arcade bloops and little digital squares.
Her R makes a big rush and leaves a trail of sparkles and rainbows like arcade poni. 
PS: If you don't want to play Diana because shes all crummy check out my post dissecting her flaws and recommending really solid changes here! Thank you everyone!