Nikhil has earlier directed Salman in "Salaam-e-Ishq" but is not keen on directing him again.
"Salman is after 'Baahubali' (SS Rajamouli's latest release has reportedly garnered over Rs 200 crore in one week) which has done so well, he now wants Rs 500 crore film. I don't want that much pressure.
"I started my production company with 'D Day' and I co-produced 'Hero', 'Katti Batti' and 'Airlift' which has got Akshay Kumar. I want to make nice simple films," Nikhil told PTI in an interview here.
"I have done a film with Salman. I have worked with Shah Rukh, Rishi Kapoor, Hrithik, Akshay Kumar. If there are no tantrums then you are not going to see their films. They are stars because they have tantrums and it is part of the game," he said.
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The "Kal Ho Na Ho" director said Salman liked "D Day" and wanted him to direct "Hero", which is remake of 1983 hit with same name, directed by Subhash Ghai and starred Jackie Shroff and Meenakshi Sheshadri.
The remake marks launch of two star kids - Sooraj, son of Aditya Pancholi and Athiya, daughter of Suniel Shetty. "Hero" is slated to release on September 11.
"Athiya and Sooraj are very good. Athiya's trademark is her confidence while Sooraj's is his honesty and his ability to connect. I think he is the most genuine human being you can ever meet. He has been through a very tough time it is a big day for him," Nikhil said.