While I do think a Satan legendary skin would've been hilarious, I most certainly disagree that Diana doesn't need a skin. She is one of the oldest champions in the game (other than perhaps Yorick?) to only have two skins. Gnar has more skins than she does and he's been out a bit more than a year.
Yes, her classic skin AND her other two skins are some of Riot's better work, but that doesn't excuse the fact that plenty of champions have gotten two skins in a single year compared to her only having two skins. She needs one more than Teemo. A lot more. She has two. Teemo. Has. Eight. Motherfucking. Skins.
And every single one of them infuriates me. Every last one of them. I honestly don't find Teemo as infuriating as most people do, I just get incredibly pissed off that a kit so toxic (hehehe. I'll just leave. . .) is paired with a furry midget who looks quite innocent. Not to mention all of his skins other than Omega Squad expand upon his cuteness (although he loses all of his cuteness once you've played against him), which is even more enraging. Diana needs this damn skin more than anyone.