In a 3rd chapter Mickey Mouse and his friends prepare to battle a new evil to save Disney and the world, with unexpected help from the world. 

SYNOPSIS:

ONCE UPON A TIME IN DISNEY 3.

Jake and Tina reunite with Mickey Mouse and their mentors Nick and Adrina and find Mickey fighting a new enemy named Voz an entity made of cruelty and malice who seeks to consume Disney, and to prevent them he sends Mickey to the real world where he starts to weaken and seeks out his friends. Jake and Tina join with Donald Duck and Goofy to find him. While traveling Mickey meets bullied kids and helps them, he also encounters kids at the children's hospital and helps them out especially one kid named Annie, then he meets foster kids and orphans and helps them out as well.

Mickey begins to weaken as Voz starts to invade both Disney and the real world, realizing their situation Jake and Nick take Mickey to a political debate conference revealing their exploits and adventures, including Mickey and that Voz is threatening them all. Then when one of Voz’s monsters attempts to harm a Civil Rights Group Brar Rabbit (from Song of the South) takes the hit and is seemingly killed, Tiana (from Princess and the Frog) scolds them and tells them all the good things about Brar Rabbit, and they lighten up with Song of the South.

As Voz prepares to invade Disney through a fog the military arrives and aids the heroes (one solider even saying “I’d take a bullet for that mouse”). Nick and Adrina manage to get to Mickey and with Donald, Goofy, Minnie Mouse, Daisy Duck, Pluto and even Pete help and Mickey manages to finally destroy Voz and save Disney. Mickey revisits the friends he made, and Disney now lets visitors interact with their characters literally.