This was today with firstborn:
There once was a mean wolf, who was battled and no longer exists. But years later, animals are disappearing. The only evidence: rainbow-colored paw prints.
It turns out, it’s the wolf’s son. Who got super powers when he was a lonely pup surviving. He also had powers to control the weather and could shoot rainbow colored lava out of its mouth like a dragon.
Luckily, there was a Barbie with water powers (like DC’s Mera) who defeated the wolf.