Similar to "Songs with one letter added, removed or changed (//vny!://discoverseattle.net/forums/index.php/topic,7823.0.html)", I think a "Movies with one letter added, removed or changed (//vny!://discoverseattle.net/forums/index.php?topic=8342)" post is worthwhile.
The Dark Knight Rinses
"You either die a hero or live long enough to become a reluctant dishwasher."
The 400-Year Old Virgin
So it's basically just Twilight.
Nightmare On Elmo Street
Stop touching me Elmo!
The Humane Centipede
"A heartwarming kid's film."