San Diego, CA -- (SBWIRE) -- 07/20/2015 -- Finding quality script ideas, that eventually become quality screenplays, is one of the most important tasks the would-be screenwriter faces. But what most screenwriters don't know is that many script ideas - even those of blockbuster (generation-altering) movies - can drastically all the way through production and on their way to the big screen.

In his new slideshare presentation, "7 Script Ideas That Changed (Dramatically) on the Way to the Screen," Michael Rogan of ScriptBully magazine goes inside the production of 7 famous films and shows how they illustrate the colloborative - and often changing - process of screenwriting.

"A ton of screenwriters I work with spend so much time stressing about making sure their script ideas are air-tight before writing their script," said Rogan. "But when you consider some of the biggest films ever, such as "Back to the Future" and "Ghostbusters" underwent huge changes in tone and subject then it gives you a bit of confidence moving forward."

To illustrate his point, Rogan shows how initial concepts for the above films were much darker and edgier than their final products. "Doc Brown and Marty didn't initially travel back in time in a mall parking lot - they used a nuclear test site!"

Even family-friendly fare, such as "Toy Story," had its roots in a much darker story. "Woody initially was willing to do anything to stay by Andy's side - including murdering Buzz."

For the most part, Rogan tries to show that simplifying a story usually leads to a better story. "When filmmakers try to do too much - straddle too many genres and please too many different audiences - they usually end up with a muddled story."

"The secret, as with most things, is that less - including with script ideas - is definitely more."

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