This means that the Dawnbringer Vex skin will also be part of the 11.19 patch, along with others. Kayn, on the other hand, has not received a skin in a long time.

League of Legends patch 9.24 brings Sugar Rush, Nightbringer, Dawnbringer, and Hextech skins, plus mid-cycle changes in 9.24b ...

Dawnbringer Vex skin made League of Legends fans outrage against Riot Games. According to them, the skin is too flashy considering Vex's gloomy personality.

Five new skins (including one Prestige skin) for Lee Sin, Vladimir, Soraka, and Aphelios have popped up for League of Legends’ patch 9.24 cycle.