Scooby-Doo and the Island Cats

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

Premise
While the rest of the gang are waiting for a new ferry to pick them up from Moonscar Island, Scooby-Doo has an adventure with the Island Cats, and also learn about the Island Cats' origins, unaware of an evil plot in the form of two ancient spirits, who intend to do harm to the cats...

Synopsis
On Moonscar Island, one day after helping find Moonscar's Treasure, the rest of Mystery Inc. is resting up to leave tomorrow, Scooby-Doo is looking at the night sky, wandering around, unknowingly followed by a few cats. After Scooby noticed that the cats were following Him, He goes faster, Then, while running to get away from the cats, He accidentally bumps into two silhouetted figures wearing Black cloaks, who were putting some cats in cages. The two figures fled, and they declared that they’d be back. With that, Scooby scaredly frees the caged cats, thinking that He’d be attacked, since the last two incidents. But the cats purred around the bewildered Great Dane, as one of the cats (A gray-furred one) placed a paw, on Scooby, who faints. Then, Scooby finds Himself in Ancient Greece, where the first domesticated cats originated. Scooby also learned that some of the cats left the comfort of Greece to explore the world, they however, became feral some time after reaching Egypt, the illusion ended afterward.

Back in reality, knowing that the two figures would come back, the Cats go back into hiding, except for one who is very sick. Scooby carefully brought the cat to the deck of the mansion, where it rested, as Scooby informed the about what happened. Later that day, three groups of people (Animal Shelter workers, Land Developers, and Artists) come to the island, for different reasons. While seeing what's happening, one cat, (a brownish one) placed a paw on Scooby, bringing His mind to Ancient Egypt, where a big group of Cats are everywhere, outnumbering the egyptians, of course, some people (Phoenixian Merchants) which Scooby thought was pronounced Venitian without being seen, smuggles handfuls of cats to the world over, as the illusion ended. Soonafter arriving, the three groups, check the environment and realize that there are some cats living there, including some rare breeds and the sick cat. But, as a shelter worker was about to take a picture of one cat, The Black Were-Cat (from the sequel) scares away the worker, along with a great number of the three groups then, runs into the forest. Then, a blueish cat leads Scooby to the pepper garden, and places a paw on Scooby's Paw, Explaining how mixed breeds of cat came into existance and when they helped eradicate the Rats in medieval Europe.