Karan Johar may not be associated with Shah Rukh Khan's Ra.1, but the filmmaker believes in lending a helping hand to his buddy's project.

While visualising SRK in the role of a superhero, KJo provided several inputs that were incorporated in the project. Says an insider, "Shah Rukh gave a draft of the script to Karan for his opinions. He read it thoroughly and suggested changes that were implemented."

No issues
Apparently, Ra.1 director Anubhav Sinha is aware of Karan's involvement and inputs in the story and had no issues. For him, the project is hugely challenging.

Adds the insider, "Karan's sensibilities and his way of working and writing has really helped Shah Rukh in his projects. It's been a good collaboration. So who else could visualise and provide inputs for SRK as a superhero?"

Also, as Shah Rukh is for the first time stepping into the realm of sc-fi and superheroes, he wanted to get everything just right.

As the insider puts it, "SRK is very attached to Ra.1's script as this movie will have him do a lot of high octane action. Moreover this techno-savvy project is for his kids. It will be a drastic change from his romantic hero image on screen."

Karan remained unavailable for comment. But a source close to confirmed that he had provided inputs to the project.

Ra.1 has Kareena Kapoor and Arjun Rampal as SRK's co-stars.