I’m the first to point out when Hollywood plagiarizes itself. I always wonder what lesson Hollywood will learn from any big-budget risk like Lord of the Rings, Titanic, and other similar films.
Passion of the Christ was probably different because it was an actor’s pet project rather than an idea shopped around, and because it already had a producer/director/writer driving the picture forward. The other studios may have shied away from trying to copycat while PotC was in production because they weren’t sure how a grim and realistic depiction of torture and crucifixion might go over with audiences.
I’m a bit surprised, like the OP, that there hasn’t been some other bandwagon film released since then. Maybe with the release of Troy and Alexander they figured there’s only so much desert-and-sandal clothing the average viewer can take. Or they are developing their copycat movies, in true Hollywood fashion, but the projects haven’t yet got out of the focus group stage because the focus participants still can’t agree what color Jesus should be. (That’s one advantage of having a controversial movie subject driven by a man with a vision — he makes choices and decisions where committees do not, even if the decisions later cause controversy.) The marketing guys might not like it because you can’t exactly release Passion of the Christ action figures (but Taco Bell is now in negotiations to get them to add a fourth figure to the Trinity to make a decent 4-cup set).
As an aside, I always figured that the simultaneous-release thing was a result of inter-studio competition. It could manifest in a few ways:
Sam the Screenwriter writes a movie with a brand new and fresh idea (say, a wish-granting magic lamp found by some kid in Cincinnati) and shops his screenplay around to Paramount and 20th Century Fox. Paramount doesn’t buy the rights to it. (Maybe they didn’t like the script, or there was an actor attached to the project they didn’t like, or whatever.) They decide to write their own script about a magic wish-granting box of bagels that is found by a group of teenagers in Los Angeles. 20th Century Fox buys the rights to Magic Lamp. Alvin, the man who green-lighted the purchase, is fired by Fox. Zeke, the man hired to replace Alvin, decides to cancel the project because he’s in a lose-lose situation: if the Magic Lamp movie is a hit, it’s not to Zeke’s own credit; and if it’s a flop, he would be to blame for not canceling it. Alvin is now hired by New Line. He doesn’t have the rights to that script any more, but encourages somebody at New Line to write their own cobbled-together screenplay of a young just-married couple in New York who finds that their heirloom wedding ring is a wish-granting magic ring. Someone (say, Roger Corman) reads in trade magazines about at least two movies in development about wish-granting magic artifacts. He reads that the Magic Bagels movie is being released by Paramount in June 2008 and decides to hurry his own version to the box office by January 2008 so he can appear dynamic, fresh and original (and grab audience dollars). Corman’s version about a book of magic spells is filmed in his back yard and has a dinosaur and a strip-club scene shoehorned into it. Universal hears about Magic Lamp and realizes it has a ten-year old script sitting around along the same lines, which they purchased years ago, about a magic monkey paw that grants wishes. They dust it off and try to position themselves as doing a high-tone movie based on literature. Zeke at 20th Century Fox hears that other movies about wish-granting magic are being made and un-cancels the original script that he himself mothballed. Now he can claim some credit for making a brilliant decision. Meanwhile, Paramount has heard that there are now five movies in the works (Magic Lamp, Magic Bagels, Magic Ring, Magic Book, and Magic Paw). The market is now saturated so they kill their own project. Roger Corman hears Paramount has dropped its Magic Bagels project but he’s already halfway through principal photography on Magic Book and decides to release his anyway. New Line ends up releasing its version direct to video.