Ekko's Release skin "demands"
-Disclaimer: This post is without knowing Ekko's Kit-
Ekko's release skin NEEEDS to be "PrimeTime Ekko".
Assuming he has a time reversal ability, as it very important in the cinematic, the phrase "Lets See That in Instant Replay" must be used for a skin.
This demands a PrimeTime/Shoutcaster-style Skin for him.