Fat Cat is a Seven Network character, no association with Prime or GWN. I think you mean Doopa Dog, GWN’s mascot. And since Seven Perth have kept Fat Cat’s goodnight segment, it’s possible that they’ll keep Prime Possum and Doopa Dog too.
While we’re on the subject, it would be fun to see Doopa Dog join Fat Cat at the Perth Telethon. See some representation from metro and regional.