Yash Raj Films, producer of both movies, reportedly does not want to publicise the title until the Salman Khan film is in cinemas.
"After discussing lots of potential ideas, Yashji has finalised a title that everybody is incredibly excited about," said a production source.
"Fans of the classic Yash Raj romance will not be disappointed when they hear what he's named his first film in eight years."
It was previously rumoured that the project would be called London Ishq, and later Yeh Kahaan Aa Gaye Hum.
"Yashji knows that fans and the media alike will go into a frenzy when they hear what he's come up with, which references a well-known Hindi film dialogue," the insider added.
"That's why he's keeping tight lipped about the title until the release of Salman Khan's Ek Tha Tiger gets over and promotions kick in after Eid on the Shah Rukh starrer."
The film, which also features Anushka Sharma and Anupam Kher, is expected to release in November.