Lagaan: A rebellious teenager must put together and train a ragtag team including a Sikh, a mute, a hairy fortune-teller, and a man with a gimp arm (who is their secret weapon), to play cricket so they can save their village from taxes that will force them all into starvation. Also, it is a Bollywood musical.
Il Mare: Woman becomes pen pals with someone whose letters take two years to reach her.
The Lake House: American woman becomes pen pals with someone whose letters take two years to reach her.
Lakeview Terrace: Cop finds out his new neighbors are an interracial couple. Racism ensues.
The Land Before Time: Five kids walk westward for a few days. All the while, their de-facto leader is following the advice of what is either a hallucination or his mother's ghost. And then they kill the guy who killed the leader's mother.
The LEGO Movie: A construction worker teams up with a motley crew of heroes (including a riot girl, an old blind man, a guy obsessed with outdated space technology, and a mix and match critter with anger-management issues) to stop a businessman from covering a city in super-glue. It ends by ripping off a Pixar property.
Or: Maximus chases Wolverine for his entire life over some bread. Along the way, Wolverine adopts Catwoman's daughter. Borat and Bellatrix Lestrange try to rob him. Eventually, they all get involved with some students who have blocked off the roads (an action which gets a horrifying number of people shot). Nearly everyone dies, though the only really villainous character survives and thrives. It's a musical.
The Little Mermaid: A girl trades her voice for feet to impress a guy who thinks she is her voice.
Alternatively: A teenager wagers her soul in a bet with a half-octopus sorceress over whether or not the teenager can seduce a prince into an Interspecies Romance in less than three days without saying a single word. The half-octopus is so impressed with her rival's seduction skills that she has to cheat by seducing the prince herself.
The Little Mermaid II: Return to the Sea: A preteen girl protests a rule against swimming by stealing the most powerful weapon in the world and giving it to a woman who previously tried to kill her whole family. Her mother tries to stop her from swimming by becoming a professional swimmer herself.
The Little Mermaid III: Ariel's Beginning: A racist, totalitarian absolute monarch bans all music and singing because it reminds him of his dead wife, having all seven of his own daughters arrested when they protest. He is Easily Forgiven after the youngest convinces him to permit music and singing by reminding him of his dead wife even more.
The Lovely Bones: A girl is murdered by Stanley Tucci, then her spirit plays around inside several Macintosh wallpapers to reach Heaven while her family deteriorates. Tucci falls off a cliff.
Lucky Number Slevin: An unlucky guy stays over at his friend's house in New York, then two gangsters try to make him commit murder and come up with a ton of money. He goes on dates with his friend's plucky neighbor.