what was the secret related to the movie?
The the screenplay was kept as a secret and waited to reveal the detriment of the story at the press conference of "War of the Worlds".
War of the Worlds (2005 film)
Spielberg kept most of the parts secret in the filmmaking, as the cast and crew were left confused about how the aliens looked. When asked about the secrecy of the screenplay, David Koepp answered, "[Spielberg] wouldn't give [the screenplay] to "anybody"". Koepp explained he would e-mail it to him, and he would give a section of the script that was relating to whatever somebody was doing. Miranda Otto thought of not even discussing the story with her family and friends. Otto said, "I know some people who always say, 'Oh, everything's so secret.' I think it's good. In the old days people didn't get to know much about movies before they came out and nowadays there's just so much information. I think a bit of mystery is always really good. You don't want to blow all of your cards beforehand."

Spielberg admitted after keeping things secret for so long, there is in the end the temptation to reveal too much to the detriment of the story at the press conference of "War of the Worlds". So, Sp
where was the movie war of the worlds filmed Virginia, Connecticut, New Jersey, California, and New York. what is its storyline? Ray Ferrier his children and  former wife "tripod" war machine emerges to destroy the area, multiple tripods that have attacked major cities around the world. who directed it? Steven Spielberg. where is he from? Cincinnati, Ohio. does he own a yacht? Yes, mega-yacht "Seven Seas". what is his net worth? $3.7 billion. did he direct any award show? Yes, He has directed fourteen Oscar winning and nominated performances. can you name a few projects he has put aside? Films like "Chocky", "A Steady Rain", "Pirate Latitudes", "The 39 Clues", and a remake of "When Worlds Collide". what are his political view? He supported U.S. Democratic Party. what is his religious belief? He grew up in a Jewish household and rediscovered the honor of being a Jew. has he contributed in any games? Yes, he has had a long history of involvement in video games. He had signed with Electronic Arts to collaborate on three games including an action game and an award-winning puzzle game for the Wii called "Boom Blox". has he appeared onscreen in any movie? He had cameo roles in "The Blues Brothers", "Gremlins", "Vanilla Sky", and "Austin Powers in Goldmember" to name a few. how many children does he have? He has seven children. who wrote the aforementioned movie? Josh Friedman and David Koepp. when did it premier? In the United States on June 29, 2005 and in United Kingdom on July 1, 2005.,
wiki:24922352
War of the Worlds (2005 film) [SEP] Secrecy
Spielberg kept most of the parts secret in the filmmaking, as the cast and crew were left confused about how the aliens looked. When asked about the secrecy of the screenplay, David Koepp answered, "[Spielberg] wouldn't give [the screenplay] to "anybody"". Koepp explained he would e-mail it to him, and he would give a section of the script that was relating to whatever somebody was doing. Miranda Otto thought of not even discussing the story with her family and friends. Otto said, "I know some people who always say, 'Oh, everything's so secret.' I think it's good. In the old days people didn't get to know much about movies before they came out and nowadays there's just so much information.