The 'Vicky Donor' helmer, who previously worked with Bachchan in the yet-to-be released movie 'Shoebite' and a few TV commercials, said the documentary is a tribute to the 70-year-old actor.
"I am making a documentary with Mr Bachchan. It is about him, his life journey. It is a tribute to him. It will take some time," Shoojit told PTI.
"He has a charismatic personality. It is an honour to work with him. Even at this age he is energetic and passionate about his work," he added.
"I have some ideas. At this moment I have ten story ideas with me which I want to tell to the audience. All of them are content driven films of different genre. I am working on a biopic as well," he said.
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"I am working on a script, a biopic based on someone who has been part of recent history. The person is a legend," he added.
Shoojit said he was always keen to make a biopic on Bhagat Singh and praised the recently released film 'Bhaag Milkha Bhaag', based on legendary athlete Milkha Singh.