The London tourist attraction officially quashed the rumours last month, saying that they would be concentrating their attentions on a statue of Hrithik Roshan.
Fellow Bollywood stars including Aishwarya Rai Bachchan and Salman Khan are already featured in the gallery.
However, the speculation over the statue has started again with an insider telling The Times of India that the actress has been travelling to London to "check the statue".
The source said: "By sheer default, her waxwork may be made public on the Indian Independence day weekend (August 15-16) that also coincides with Saif's 41st birthday (August 16)."
Kapoor had her famously size zero measurements taken by Tussauds staff four months ago, but has kept any other details of the statue secret, according to the paper.
The source added that the actress is planning to spend the weekend of the unveiling with Khan, her parents and sister Karisma in London.
