Senior party leader Shah Mehmood Qureshi said he didn't see the current assemblies completing their five-year terms, which began last year after the general elections in May.
"The next general elections will be held before 2018 and the current assemblies will not be able to complete their tenure," said Qureshi.
Qureshi, who was formerly with the Pakistan People's Party, told reporters at the Karachi airport that the National Assembly Speaker wants to engage in horse trading by calling the PTI lawmakers separately.
Imran has taken the resignations of his party MNAs and MPAs and this has led to the National Assembly Speaker directing the PTI lawmakers to appear before him to confirm their resignations.
After a successful rally in Karachi last Sunday for which PTI chief and former cricketer Imran Khan and other senior leaders flew in from Islamabad, the party will hold another rally at the Minar-e-Pakistan in Imran's hometown of Lahore tomorrow.
Qureshi claimed the rally would mark the beginning of the movement for a new Pakistan.
Imran who has been leading the sit-in for the last 42 days has refused to end the protest until Nawaz Sharif resigns.
