Scooby-Doo and the Island Cats

This Idea takes place, right after Scooby-Doo Return to Zombie Island.

Premise
Hours after solving the mystery on their second visit to Moonscar Island, The Mystery Inc. gang learn about the Island Cats' origins, unaware of an evil plot at work...

Synopsis
While Mystery Inc. camp out at Moonscar Island, preparing to leave at morning, they have Shaggy and Scooby stand guard for the black cat creature that’s still around. One hour later, Scooby falls asleep, but wakes up, spotting what He thought was the cat creature, was actually, an orange cat, black cat, and gray cat, all going in the cavern. Scooby then checks the cavern and once inside, He hears voices saying they need a couple more days. Scooby, not sure what the voices were, goes deeper in the caverns and saw only a white cat, brown cat and light brown cat resting on the base of the cat idol. Confused that there was no one else, Scooby was about to exit the cave, until He spots the three cats glowing in a blue color, then leaves quietly but quickly. Scooby, after leaving the cave, spots someone in the shadows exploring the marsh. as Scooby ran back to warn the others, He gets caught in a steel trap, meant for a cat. Two shadows approach the trap Scooby is trapped in. One of the shadows suggests getting rid of the dog by drowning Him. fortunately, before the cage even touched the water, The Cat Creature attacked, and the shadows fled. with the shadows gone, The Cat Creature tore through the cages, freeing the captive cats, but leaves Scooby still inside the cage. Soon, the three cats (Orange, Black, and Gray) help free Scooby from the trap.

At morning, Scooby wakes the gang up and tells them about the shadows, but the cats go into hiding, after seeing people arriving on the island. Scooby and the others, hide and overhear that one of them, asks the police to arrest any trespassers here. knowing that the police won't listen, they make a run for the cave. As one one policeman was heard going inside, Mystery Inc. see one of the cats’ eyes glow, opening a secret passage to a deeper part, allowing it and Mystery Inc. to follow it, and closes, but not before the policeman arrives, witnessing the passage closing. Safe from the interlopers, Mystery Inc. explore the cavern and at the end of the tunnel, They spot a cat statue, but of a benevolent expression. After a few minutes, Mystery Inc. enter a corridor and inside it, they find cave paintings, and soon, they hear a female voice, saying that the shadows have returned, intent on capturing the cats. Eventually, they exit the cave in the island's southernmost point.

Trivia

 * The Six Cats seen in the Cavern at the end and the beige kitten seen in "Scooby Doo: Return to Zombie Island" get a bigger role.
 * The Song "It's Terror Time Again" is used during the final showdown between Scooby with the Cats and the Culprits, but in an extended mix.

Songs

 * It's Terror Time Again (Extended Version)
 * Clouds of Clowders