Ayan Mukherji has been signed up to direct the trilogy, featuring Amitabh Bachchan, Ranbir Kapoor and Alia Bhatt, which is backed by Johar's banner Dharma Productions.
The first part of the series is reportedly scheduled to be released in August 2019.
"It's in prep mode. The shoot will start in February- March for the first part. Then hopefully, every two years we will have a new part of 'Brahmastra'," Johar said on the sidelines of an event.
The movie will see Ranbir playing a character with special powers.
Johar also said he will soon announce his next home production featuring Sonakshi Sinha. He recently collaborated with the actor for the "Ittefaq" remake.
"We (Sonakshi and I) are doing one more film together. The announcement will be made in two weeks," he said.
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