Listen to What's New Scooby-Doo? Main Theme (From "What's New Scooby-Doo?") online. What's New Scooby-Doo? Main Theme (From "What's New Scooby-Doo?") is an English language song and is sung by Just Kids. What's New Scooby-Doo? Main Theme (From "What's New Scooby-Doo?"), from the album What's New Scooby-Doo? Main Theme (From "What's New Scooby-Doo?"), was released in the year 2021. The duration of the song is 2:01. Download English songs online from JioSaavn.