Another "Describe the plot of a movie " thread, but,,

[The Captain]

Jackie Robinson, burdened by the death of his father Othello, ascends to the throne of his home country of Wakanda, inheriting the powers of the hero Black Panther. With the help of CIA agent Bilbo Baggins, personal bodyguard Michonne, techie sister Nish, and love interest and spy Maz Kanata, Jackie takes on the infamous arms dealer Gollum to finish what his father could never accomplish. But, to the shock of the nation, his long-lost cousin Adonis Creed comes to make a play for the throne and beats the now de-powered Jackie. Thanks to his friends, family, and an unlikely alliance with former enemy Gabe Wilson, Jackie goes to fight his prodigal cousin and reclaim what is rightfully his.

[El Pollo Guerrera]

Here's a good one... Doctor Loomis' former patients (Curly Washburn, Bela Lugosi, Dynamo, and a fourth unknown patient) escape from a mental institution to kill Lt. Barclay.

[fw91]

Forest Gump is jealous when Tim “The Toolman” Taylor becomes a child’s favorite toy.

[Mighty Attack Tribble]

Buzz Lightyear is a washed-up sci-fi TV actor with a huge ego. When a race of aliens led by Keith Mars, who've mistakenly believed Buzz's old TV show to be historical fact, transport him and his crew - Ellen Ripley, Hans Gruber, Adrian Monk, Patton Plam, and Justin Hammer - to a working recreation of their old show's starship, he must confront his failings to gain the respect of his castmates and stop the plans of Zaeed Massani, who his hell bent on wiping out the peaceful Thermians.

[XIII]

The guy from Field of Dreams and Newman are part of the legal team that brings charges against Ty Cobb for the assassination of JFK.

[Sir Woodrow]

Wicket the Ewok and Jim Morrison save a baby from Mombi, they get help from Christine Keeler and Chuck Cunningham

[4real]

Andy Dufresne puts a bomb in The Dude’s car to frame him as a terrorist.

Batman tries to scare Kevin McAllister's Mum, Edward Rooney & Veronica Sawyer out of a house at Jack Ryan & Thelma Dickinson’s request.

[Susan "Poison" Candy]

While sailing across the Atlantic, Romeo Montague falls in love with Princess Sarah who is in a complicated relationship with King Talus all while chaos is happening all around them during the trip

[Sir Woodrow]

The Dude gets pulled into a strange world where meets computer versions of his friends Captain Sheridan & Lacey Underall, they save the world from Dr Necessiter

[fw91]

Ellis Boyd"Red" Redding is God and relinquishes his powers to Lloyd Christmas.

[LastCall]

Ant-Man and his best friend, Stifler, get arrested after they cause a ruckus at a high school while promoting their energy drink. In lieu of jail time, they opt for community service. Their parole officer, Sergeant Calhoun, assigns them to the big brother program. One of the little brothers, McLovin, is involved in a LARP group lead by Mr. Chow. During the course, Ant-Man also tries to rekindle the rocky relationship between him and his girlfriend, Rita Repulsa.

[Perpetual Nirvana]

The Punisher and Andromache try to survive against sharks who've already eaten Nick Fury.

[Mrs. Potato Dick]

Mr. Krabs murders a man just for crying while God's friend, Norville Barnes escapes from prison.

[FHgrad99]

Wayne Campbell travels through time to save the world from a group of criminals led by Shrek.

[wildojinx]

Scott Pilgrim gets J. Jonah Jameson's daughter, Kitty Pryde, pregnant.

[Ash Kingston]

After witnessing the death of his father, Thulsa Doom, and with his uncle, Simon Gruber, telling him it was his fault, Randy Taylor runs away from the Pride Lands, where he meets the wiry Max Bialystock and his flatulent friend, Aldo Hopper. Years later, having grown up, Randy - now Inspector Gadget - is reunited with his childhood friend (and maybe sweetheart) Karen Roe, and after a pep talk from the spirit of Thulsa Doom, returns home to free them from the rule of Gruber and his hyena minions, Sister Mary Clarence, Cheech, and (apparently) Shang Tsung.

[Perpetual Nirvana]

Green Goblin and Batman hang out on an island and nobody knows what the hell is going on.

[wildojinx]

Thought I'd bring back this thread:

Jack Tripper, Judge Harry Stone, Venus Flytrap, Nick Lobo, and Martha Kent must reunite to stop Frank N Furter once and for all.

[Spiderf 4]

Captain Ron is recruited by Master Ninja to save President Pumaman-Hater from the evil clutches of Chef.

[El Pollo Guerrera]

Damnit I gotta go through everything to make sure I don't post the same thing twice...

OK, here's one:

RoboCop and his band of friends (including The Kurgan, The Collector, and The Mandarin) try to stop Lord Farquaad from bringing aliens to Earth.