In the film’s trailer, it is shown that Varun and Janhvi are in a relationship, but they have nothing in common. Amid problems of their marriage, they decide to take a trip to Europe and explore places where World War II took place, and the characters talk?of a “world war within.” There’s a scene where Janhvi Kapoor as Nisha says, “Hum sab bhi toh thode bohot Hitler jaise hi hai na (we all are a little bit like Hitler).”

At the trailer launch event, which took place in Dubai, Nitesh talked about the film's reference to Hitler and World War II, and said, “While creating a character, you can go back and look at the events and incidents which can play an important role in the overall arc of that character and the relationship in general. It’s not just about Hitler. There are many more things that you may not have seen in the trailer. Every incident has been very carefully chosen that can have an impact on the overall arc.”

Reasoning why it was important to include Hitler in the film, Tiwari asserted, "World War II is humongous. There’s so much that has happened and you can’t take everything. You’ve to pick and choose things which would probably impact the journey of the characters and that’s precisely why it [World War II as a backdrop] has been taken. Hitler also happens to be a part of it and you can’t not have him in World War II.”

‘Bawaal’ is all set to premiere on Prime Video India on July 21.