The two films will fight it out at the box office on January 26.
Featuring Manoj Bajpayee and Sidharth Malhotra, "Aiyaary" narrates the fallout and subsequent face-off between two Army officers - a mentor and a protege.
While Akshay's "Padman", directed by R Balki, is based on the life of Arunachalam Muruganantham, the inventor of a low- cost sanitary pad-making machine in India.
When asked about the clash, Neeraj told reporters, "What can I say about 'Padman'? When our film was launched, we wanted to come on January 26, 2018. That's the journey of the film and we are looking forward to it."
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Neeraj has collaborated with Akshay in films such as "Baby", "Naam Shabana", "Rustom" and "Special 26". Akshay and Sidharth have starred together in the 2015 film "Brothers".
The director was speaking at the trailer launch of the movie.
Neeraj said the idea for the drama-thriller struck him while he was working on "Baby".
"The work for the film, in a way, started during 'Baby'. Even while we were shooting for 'MS Dhoni', something was going on in my head for 'Aiyaary'," he said.
"I am worried about everything, as far as the rules and regulations are concerned. I think the team would have already initiated the process.