Brahmastra: Plot-line of Ranbir Kapoor-Alia Bhatt-Amitabh Bachchan starrer revealed?

If reports are to be believed, Ranbir Kapoor, Alia Bhatt, Amitabh Bachchan, Mouni Roy starrer Brahmastra's plot is said to be inspired by that of Avengers. Brahmastra is a sci-fi- superhero fantasy trilogy which is being helmed by Ayan Mukerji.