I wouldn’t mind a robotic skin for Quinn, personally. She’s missing a more modern/tech-like skin in her roster, and Hextech/Bullet Angel/PROJECT would all be really fitting options for her and Valor’s design.
That said, a fantasy-based skin wouldn’t be all bad either, as she is lacking something a bit darker in tone. Omen of the Damned, Ravenborn, Coven, Soulstealer, and Medieval would all be great alternate fantasies for the champ to explore.
I just really hope she doesn’t get an April Fools skin any time soon. She hasn’t even had her first serious 1350 RP skin yet and her last skin was already quite lighthearted in theme.