GOOD MORNING: John Landis is ahead of sked on “The Stupids”– and that’s a problem. He gave the pic’s star, Tom Arnold, a day off to do reshoots on “Big Bully,” then time off to wing to N.Y. to guest on Letterman for “Nine Months” followed by the preem in L.A. And now Landis will give Arnold a week off for his July 22 wedding to Julie Champnella. Landis says he’ll have to search for scenes to do sans Arnold next week. Today, they’re hoping the heat wave on the Uxbridge , Canada, location of the Savoy/Imagine pic cools off — it has been 105, with drenching humidity. Despite the above, Landis says he’s enjoying the movie, which could be G-rated, loaded with “family values.” The “Stupids,” as played by Arnold and Jessica Lundy, with the “children,” Bug Hall and Alex McKenna, are “a wild bunch, but lovable and heroic — as well as being very funny,” promises Landis of the Brian Grazer-produced, Leslie Belzberg-exec produced, Brent Forrester-scripted version of the Harry Allard/James Marshall children’s books. “It’s Beatrix Potter meets ‘Monty Python.’ ” He’s not worried about the public confusing his “Stupids” with last year’s “Dumb and Dumber.”"It’s the marketing department’s job. After all, my first movie was titled ‘Schlock!’” He admits, “It’s great to make a picture that my children (13 and 10) can see.” His wife, Deborah Nadoolman, is doing the “Stupid look” costumes. She’s now in London for Costa-Gavras’ next, a sci-fi’er … Costa-Gavras cameos in “Stupids” along with these directors: Bob Wise, Atom Egoyan, Gurinda Chada and Norman Jewison. “That’s how I get to meet them,” Landis laughed. Christopher Lee, Bob Keeshan, Mark Metcalf and Matt Keeslar round out the cast. There’s a possibility of “Stupids” sequel films. What happened to plans for a “Blues Brothers” sequel? Landis says now that Ron Meyer’s coming to MCA/U, “Blues” will be No. 1 on talks when he returns. “Dan Aykroyd, John Goodman and Jim Belushi and I — we’re passionate to do it”… Landis, who did Michael Jackson’s “Black and White” and ‘Thriller” musicvideos, told me he was “horrified” when he heard the anti-Semitic lyrics of Jackson’s “HIStory” album.DOVE AUDIO HAS FILED SUIT against ABC and senior producer Shelley Ross, claiming breach of contract, interference with contract and fraud. The complaint , filed in Superior Court by Dove attorney Steven A. Soloway, is based on written and oral agreements with ABC and Ross not to air interviews with ex-Simpson juror Michael Knox (his Dove book is “The Private Diary of an O.J. Juror”) prior to July 5 on “PrimeTime Live.” They aired on “Nightline” June 26. As a result, Dove claims loss of contracts with People, plus other network programs, as a result of the early/different ABC airing. There are other complaints — it could all point out the monetary value of specific TV publicity agreements for books/authors on specific shows/times … Ken Kragen’s conversation with Helen Kushnick when she repped Jay Leno will be repeated by Kragen in person as he plays himself in HBO’s “The Late Shift,” with Kathy Bates playing Kushnick. Latter nixed Travis Tritt as a Jay Leno guest because Kragen wouldn’t pull him off an Arsenio Hall date. Another Kragen client, Trisha Yearwood, was then bounced from a Leno guestint … Shelley Winters is recuping from hip (right) surgery — having been operated on in the same hospital, same surgeon as her “Place in the Sun” co-star, Elizabeth Taylor. “It must have been something in the water at Lake Tahoe,” jokes Winters. She’ll be OK to co-star in Jane Campion’s “Portrait of a Lady,” to film in London and Florence. Nicole Kidman, John Malkovich and Shelley Duvall co-star; John Gielgud’s slated to play Winters’ husband. Winters hopes to apologize to Gielgud for once having introduced him as “Noel Coward” to Nancy and then-Gov. Ronald Reagan at a Hollywood event. “He (Gielgud), being a perfect gentleman, just said, ‘I’m pleased to meet you,’ and moved along.” WILLIAM MORRIS ALUMNA Joan Hyler, now with her own personal management banner , intros “The Agency: William Morris and the Hidden History of Show Business” (HarperCollins) author Frank Rose at tonight’s UCLA Extension course on agenting. Hyler could write her own book about agenting … The Human Rights Watch Intl. Film Fest of movies on human rights around the world — which kicked off Saturday at the Museum of Tolerance — oversold its High School Project, filled to capacity for Tuesday’s screening of Carlos Avila’s “La Carpa.” However , it gets a special screening Wednesday of Michael Apted’s “Moving the Mountain, ” at which Apted’s agreed to join the students in discussion as well. Trudie Styler (Sting’s wife) produced the pic about China’s student leaders of Tiananmen Square … Producer Michael Levy (“Eye for an Eye,” starring Sally Field) married designer Sharon Szolyan July 4 and they’re off on a European honeymoon … Rod Stewart wings in from London to headline tonight’s CTAM (Cable TV Assn. of Marketing) ’95 in San Francisco under MTV’s auspices.