VS Skins For the God-King Event

Okay, so from what we've been shown, God-King Garen has a spirit animal thing in the form of a lion, and God-King Darius has a wolf. So, I ask, why didn't Warwick and Rengar get skins of their own, like God-Companion or Spirit Animal, matching the themes of their respective God Kings? I feel like this would've been a cool addition to the skin pool, and Rengar doesn't have that many skins regardless. The theme would stay the same, nothing would change, it's just two new skins. Maybe Riot is saving content, maybe they just wanna be a dirty little tease about new skins, or maybe it just wasn't in the cards this time around. Either way, I would like to see skins like these added in the future. Just my thoughts.