Prince of Egypt - The Artist Formerly Known as the Prince of Egypt
Pokemon - Hokeymon (Best I could come up with)
Being John Malkovich - Peeing on John Malkovich
What Dreams May Come - Wet Dreams May Cum (Yes I know)
Saving Private Ryan - Saving Ryan's Privates (Too easy)
Payback - You'll Want Your PAYBACK After Viewing This Crappy Movie
One of my projectionists was contemplating this one for James Bond 007: The World Is Not Enough - James Bond 007: Two Surround Channels Are Not Enough (Since the movie is in EX Surround)
What are some other good ones?
I usually add "...In my pants".
The Best Man...
The Messenger...
Double Jeopardy...
Pokemon...
Titanic...
Anaconda...
You get the idea.
We always put the correct title on R1. The rest were similar.
"Stella Dumbass" (Stella Dallas)
"I Lust Loosly" (famous redhead TV show)
"The Beveridge Hillbillies"
There were alot of sick people at my station. It was fun

Some of the more popular ones I can remember from the 80s and today:
Splash: 'Daryl Does Disney' (remember the (gasp) partial nudity in this Disney (ok, Touchstone) flick?))
101 Dalmatians: '99 good reasons to neuter your dog'
D.A.R.Y.L.: which stands for, of course, <D>umb, <A>sinine <R>etarded <Y>ucchy <L>amebrain
E.T.: 'E.T. The Extra Testicle'
The Goonies: 'The Gonads'
Invasion USA: 'Evasion IRS'
Gymkata: 'Gymkaka'
American Anthem: 'Gymnastics Rocky'
Youngblood (the Rob Lowe one): 'Hockey Rocky'
Over The Top: 'Arm Wrestling Rocky'
The Karate Kid: 'The Judo Jerk'
Meatballs: 'Beatballs'
Breakin': 'Broken' (duh)
Breakin II-Electric Boogaloo: 'Broken II-Electric Booger'
***and so on for the 80s, I can try to remember more of them...***
The (later) 90's:
Simply Irresistible: 'Simply Inconceiveable (That this film could make any money!)'
Kazaam: 'Shaq Attaq from Iraq'
Courage Under Fire: 'enCOURAGE UNDERwear FIREs'
Saving Pvt. Ryan: 'SHAVING Ryan's Privates'
- I have seen a marquee that had the letters in this title rearranged to read 'Pet A Vagina' as well hehehe 
More to come....
Aaron
Notting Hill...Nodding off!
Star Wars-The Phantom Menence...Fart Wars-The Pass Gas Menence
Cable Guy-The coaxial entertainment installation person (P.C. of course-must...not...offend....)
For the Love of the Game...For the Love of the Shame
Mighty Morphin Power Rangers...Mighty Moron Power Rangers
--Chris
.007 cents: The Gross Is Not Enough
The Bare Wench Project
That's a follow-up to her not-so-original title "Stripteaser"
She's also doing a series for Cinemax with an equally dubious title I can't remember now...
Random Hearts-- Random Farts
Happy Texas-- Sappy Texas
Play It To The Bone-- Play with My Bone