Harold and Maude (1971)
This unlikely romance between a 19-year-old boy and an 80-year-old woman needs to crank up the action and the sexiness. Have the pair pull a cross-country crime spree, blowing up every cop car and making love in every motel from here to Flagstaff.
New Cast: Zac Efron as Harold and Helen Mirren as Maude

Plan 9 From Outer Space (1959)
Aliens come from outer space and bring the dead back to life as zombies? How has this not been remade by Zack Snyder or Michael Bay already? Either way, it needs more explosions, and this time the deceased Bela Lugosi can simply be inserted digitally.
New Cast: John Turturro as Eros, Matthew McConaughey as Jeff Trent, Angelina Jolie as Vampire Girl

The Warriors (1979)
Any sane director would be willing to come out and play with this story of a gang bopping their way from the Bronx to Coney Island while being hunted by every other gang in New York. There could be a lot of drag racing in it, to bring in the Fast & Furious crowds, and the cast could be a who's who of young Hollywood!
New Cast: Joseph Gordon-Levitt as Swan, Shia LaBeouf as Ajax, Bow Wow as Snow, Jaime Foxx as Cyrus

Faster, Pussycat! Kill! Kill! (1966)
Everyone loves McG's Charlie's Angels movies, right? So why not have him tackle the remake of this movie about three murderous go-go dancers who target the inhabitants of an isolated farmhouse? Maybe the dancers turn out to be Terminators?
New Cast: Rose McGowan as Varla, Elizabeth Banks as Billie, Rosario Dawson as Haji

They Live (1988)
If there was ever a movie that could have benefited from a bigger budget, it's this John Carpenter classic, where a construction worker discovers that the world is run by skeletal aliens who want to keep the human population fat and content. Use CGI aliens instead of ugly puppets, and have Nada and Armitage punch each other through buildings during their massive brawl.
New Cast: Jason Statham as John Nada, Will Smith as Frank Armitage

The Toxic Avenger (1985)
Superhero movies are hot, so why not relaunch the original superhero franchise? Mainstream America may finally be ready for a melty-faced janitor with a mop and a tutu, as long as that janitor is played by The Rock.
New Cast: Dwayne Johnson as Toxie, Amy Adams as Sarah

Heathers (1989)
Populated with the correct mix of post-Disney stars and turned into a musical, this dark teen murder-comedy could be a box office smash! Get the Jonas Brothers to perform a song or two before they all get violently beheaded.
New Cast: Miley Cyrus as Veronica, Aly & AJ and Vanessa Hudgens as the Heathers

Repo Man (1984)
In this age of foreclosures and bad financial planning, a movie about a repo man would hit close to home for a lot of people. But mix in a crazy alien invasion plot, a kickin' punk-rock soundtrack and a sexy CIA agent, and you've got a winner!
New Cast: Seann William Scott as Otto, Bruce Willis as Bud, Jennifer Garner as Agent Rogersz

Time Bandits (1981)
In 1981, director Terry Gilliam assembled the A-Team of diminutive actors to play a team of time-traveling dwarf thieves -- it was the Ocean's 11 of the under-4-foot set. With today's Benjamin Button technology, we can make any actor three feet tall! Why not downsize the best?
New Cast: George Clooney as Randall, Brad Pitt as Wally, Matt Damon as Fidgit

The Adventures of Buckaroo Banzai Across the 8th Dimension (1984)
If James Bond can be reinvented as a Jason Bourne type, then surely Buckaroo can be reinvented as a James Bond type? The man is a brilliant scientist, a fearless test pilot and a timeless rock-and-roller, and we want to see him take on invading aliens masquerading as humans again. And maybe this time he'll get a sequel!
New Cast: Robert Downey Jr. as Buckaroo Banzai, Keanu Reeves as Perfect Tommy, John Malkovich as John Whorfin

What cult movie would you like to see remade? Which one should nobody ever touch?