Hero's Son and Rival's Nephew

Hero's Son and Rival's Nephew is an upcoming 2018 American animated buddy comedy drama film starring Mickey Mouse and directed by Brad Bird. The film will be released in theaters on June 21, 2018 produced by Walt Disney Animation Studios and distributed by Walt Disney Pictures.

Plot
Elmer Mouse is a young boy mouse who once lived alone in a treehouse in the city of Mouseton. On the last day of school before summer vacation, Elmer and his best friends Marius Kentis and Artie Holden spy on their school's worst bully, Walter Cunningham, hijack the auditorium stage in the middle of Principal Chesney's speech, creating a small rally where Walter rails against the benefits and honors that students are entitled to, but Elmer, Marius and Artie stop him with the help of Principal Chesney. The rally fails in making Walter a popular schoolmate and impressing his ex-girlfriend, Maia Pfeffer; and as result, he is sent to Chesney's office. Maia thanks Elmer and agrees to get together with him on a date the coming evening. Eventually, Elmer, Marius and Walter are called in to the office, where they explain the occurrence and Chesney forewarns Walter's uncle, Mortimer Mouse that Walter's actions may result in him facing serious consequences, angering Mortimer.

After school, the school's orchestra is performing Pomp and Circumstance, and before the orchestra performs the last verse of notes, the school takes separate sides so that Elmer can come out of the front door, to be greeted and congratulated by his fellow classmates, but before he can leave, he is given thanks by his teacher, Herr Schmidt, Secretary Lerkel and Principal Chesney for making their last day of the school year. Elmer exits the school on the song's last note, running through the crowd, and Maia meets him at the beach for their date, but Walter has plans of revenge on Elmer for getting him in trouble.

When Elmer sees Walter creep up behind them, Elmer gets Maia to go into hiding while he fends off Walter, resulting in a serious argument between the two and Maia, who takes Elmer's side despite Walter's objections, which angers him, prompting him to break apart Elmer's beach spot and run, hurting his feelings. That evening, Minnie Mouse finds a sad and alone Elmer on the beach. Following her advice to be himself and not fight back with people like Walter, Minnie takes the boy to her boyfriend Mickey Mouse's home, where they start getting to know each other well. Meanwhile, Mortimer and Walter have a heated argument on Maia and his stunt at school, resulting in Walter telling him he should get a girl, and Mortimer knows who, his ex-girlfriend, Minnie. That night, Mickey allows Elmer to stay with him in his home.

The next morning, Mickey takes Elmer out for a ride with him and Minnie in a fancy car. The two go to several locations that satisfy them. They stop at a cafe for a bite to eat where they meet Marius, Artie and their quirky friend, Dunbar Shoemeyer again. When Mickey's arch-enemy Pete overhears a conversation between Elmer and Mickey, he tells Walter and Mortimer that Elmer has no parents and his mother is apparently dead. That afternoon, Mickey, Minnie and Elmer come to a cemetery, where Elmer leads them to his mother's grave, where Elmer tells them his last memory of his mother and how he first met Mickey and how his mother died, making Minnie cry. The sad mice hold a moment of silence for Elmer's mother, until Pete, Mortimer and Walter sneak up behind them. After Walter openly insults Elmer in front of Mickey and Minnie because his mother his dead, Mortimer tries to steal Minnie in front of Mickey, Elmer, his friends and Walter's incompetent gang, the Kovacs, Mickey reaches a payphone to call the police as Pete pulls out a gun to kill the boy, but Elmer ram headfirst into Walter, Mortimer and Pete and falls unconscious from the impact. Pete, Mortimer and Walter are arrested and sent to jail by Police Chief O'Hara while the paramedics come to take Elmer away while his friends all watch sadly.

Days later, Elmer recovers in the hospital from a concussion that he suffered from ramming into the three imprisoned criminals. After a while, Elmer is released with a discharge and reunites with his friends, who waited outside. Elmer bids his goodbyes to his friends, promising to see them again sometime in the next weeks, they accept and admit he has always been a good friend in school and the bravest before they leave for home. Elmer goes to Maia's home to visit her, which overjoys Maia, who understands his grief over his mother, and tells him he has a good father figure who will take care of him. Mickey and Minnie also learn that Elmer is safe and are overjoyed to see him alive and well. Mickey accepts him as an adoptive son, and Elmer happily to introduces them as well as his fancy rat Bobo to Maia.

Credits
See them here.

Cast

 * Bret Iwan as Mickey Mouse, the hero and most loved citizen of Mouseton.
 * John Sturtridge as Elmer Mouse, a young boy mouse who becomes Mickey's friend and later adopted son.
 * Russi Taylor as Minnie Mouse, Mickey's ever-loving girlfriend who understands Elmer and brought him to Mickey to raise.
 * Maurice LaMarche as Mortimer Mouse, Mickey's longtime rival who is constantly after Minnie's affections and hurting Elmer on the street.
 * Bill Farmer as Pluto, Mickey's beloved pet dog.
 * Kaitlyn Maher as Maia Pfeffer, a girl mouse who falls in love with Elmer at first sight on their first day in Mouseton.
 * Gavin MacIntosh as Walter Cunningham, a pre-teenage mouse and Mortimer's nephew who wants Maia, who does not like him. The conflict makes him Elmer's sworn enemy.
 * Zach Hammer as Marius Kentis, an older friend of Elmer's who is allowed to drive.
 * Dakota Fanning as Elisabeth Cronkite, Marius' girlfriend, who taught him how to drive safely, which helped.
 * Jim Cummings as Peter Pete, Mickey's arch rival who has a hatred for Mortimer but is on top of Mouseton's "Wanted" list.
 * R.D. Robb as Gangus Kahn, a member of Walter Cunningham's gang, the Kovacs.
 * Josh Gad as Dunbar Shoemeyer, a friend of Elmer and Marius' who likes to fish play antics at times.
 * Davey Towers as Artie Holden, a smart friend of Marius' who is an expert in chemistry.
 * Daniel Stern as Martin Plymouth, the dumbest member of Walter Cunningham's gang, the Kovacs, who is never listening.
 * Oliver Masucci as Herr Schmidt, Elmer's teacher
 * Liam Neeson as Principal Chesney, Elmer's understanding school principal who would be delighted to give Walter detention for misbehavior.
 * Demi Moore as Secretary Lerkel, Elmer's school's secretary.
 * Corey Burton as Chief O'Hara, the chief of the Mouseton's Police department.
 * Frank Welker as Figaro, Minnie's pet tuxedo kitten.
 * John Kassir as Bobo, Elmer's pet fancy rat.

Music
The score for the film will be composed and conducted by Thomas Newman and performed by the London Symphony Orchestra, featuring choral performances by the London Voices. It will also feature piano solos by Jon Schmidt and cello solos by Steven Sharp Nelson.

Track Listing
 * 1) Main Title (Thomas Newman)
 * 2) Last Day of School (Pomp and Circumstance, Edward Elgar)
 * 3) Elmer's Wondrous World (Newman)
 * 4) Beach Fight (Newman)
 * 5) Bad Night (Newman, piano solo by Jon Schmidt andcello solo by Steven Sharp Nelson)
 * 6) Meeting Mickey (Thomas Newman)
 * 7) Evening In The Park (Thomas Newman)
 * 8) Out For A Ride (Shake, Rattle and Roll, Bill Haley and his Comets)
 * 9) Mickey and Elmer (Newman, piano solo by Schmidt and cello solo by Nelson)
 * 10) Mother's Grave (Newman, piano solo by Schmidt and cello solo by Nelson)
 * 11) War With Walter (Newman)
 * 12) Elmer In The Hospital (Newman)
 * 13) Live With Us (Newman, choir)
 * 14) I Will Always Love You (Whitney Houston)

In other languages

 * Brazil: Filho do Herói e Sobrinho do Rival ("Son of the Hero and Nephew of Rival")