While the games aren't "literally a part" of each other, they do connect spiritually. It's a "big challenge" to make a 2 hour movie with colossi battles.
"Ueda-san's vision is amazing, and despite those games not being literally a part of the same series, there is a spiritual connection between them," Misher Films' Kevin Ping Chang said. The announcement of a Shadow of the Colossus film came in April '09.
"It is certainly something we've fought for as a production company, making the case to both SCE and Sony Pictures and saying, 'If Colossus works, this is a vision we can continue translating for at least two more episodes,'" he continued. "We would love to do that."
Misher Films appear to be taking the IP very seriously. "For Colossus, beyond the cinematic quality of having Wander battling these sixteen colossi, we have to effectively translate that into a narrative that people are going to want to watch for two hours," said Chang.
"Without getting into the specifics of the script, that's a big challenge, especially for something so stark." Sony Japan is heavily involved and Sony America consulted each month.
"... So these colossi battles need to be very significant, they can't just be one after the other, there has to be something learned from them. We need to be cognisant of that and say, 'We're not going to do a montage sequence.' Each of these battles need to feel extremely powerful from a dramatic and cinematic standpoint."
"As for Team Ico," Chang added, "we like to keep Ueda-san as best up to date as necessary. When we feel like we're comfortable with the product, we'll approach him and ask, 'Is this something that speaks to your vision and your inspiration?'"
"The very first meeting - probably my most nervous meeting - between him and our team, we had to explain to him what we saw for this movie. I didn't say a thing in that meeting, it was all my boss and the writer!"
"We want Ueda's feedback as much as possible," he continued, "especially in terms of knowing certain character's motivations for what they're doing, where the character is born, etc. With that information we can begin to build the movie."
The most recent big news for Team Ico would have to be the announced HD Collection for both ICO and Shadow of the Colossus coming to PS3 - upgrading the PS2 cult classics to full HD releases on a Blu-ray disc, much like the God of War Collection.
Are you welcoming to a Shadow of the Colossus feature film, videogamer?