Earlier this year, writer Anthony Horowitz revealed he had penned a script for the movie - which is based on the popular Belgian comic series - based partly on Tintin book Prisoners Of The Sun.
However, after discussions with director Steven Spielberg and producer Peter Jackson, he has decided to rethink the basis of the film.
He told the BBC: "That was true a few months ago but I can tell you that I think the second film is not going to be Prisoners Of The Sun... What it is going to be is still under discussion."
The writer said: "I've had meetings with the directors and producers and we've talked about ideas and action sequences.
"At the moment I'm trying to put together a story that will please everybody. It's a very difficult one to do."
The first film, The Adventures of Tintin: The Secret of the Unicorn stars Jamie Bell, Daniel Craig and Andy Serkis and was written by Steven Moffat, Edgar Wright and Joe Cornish.
Peter has previously revealed he plans for a 'Tintin' franchise and has ideas for a second, third and fourth movie.
He said: "One of my favourites is The Seven Crystal Balls, so that's the one I've always been thinking of.
"I also really like the Eastern European ones, the Balkan ones like King Ottoman's Sceptre' and 'The Calculus Affair. I think it's a terrific setting for a thriller, the weird Balkan politics and the mysterious secret service agents.
"I think the Moon ones are terrific, but they'd be good for the third or fourth Tintin film, if we get that far. We want to keep his feet on the ground just a little bit longer."