The former prime minister said his journey for Lahore via the GT Road has been organised so he can express gratitude to the masses for their support to him and his party.
Despite the security threat to Sharif's rally, "there is no change in the plans", Punjab government spokesman Malik Mohammad Ahmed said.
The current leader of the party is Nawaz Sharif.
In the subsequent tweet, Imran said that Sharif is to realize people getting discontented after repeatedly hearing "poor umpiring" excuses. The next general election is due in June 2018.
Pakistan's ruling party may field ousted premier Nawaz Sharif's wife Kulsoom or his daughter Maryam from the seat that fell vacant after he was disqualified from holding office, a senior party leader said yesterday. He was joined by his replacement as premier, Shahid Khaqan Abbasi. Punjab Law Minister Rana Sanaullah asserted Sharif's would be the biggest rally in Pakistan's history.
The rally came a day after Sharif said he was determined to go to his home despite Monday's truck bombing in Lahore, in which two people were killed. Sharif launched the so-called "caravan" procession from Islamabad to his hometown of Lahore, amidst concerns regarding his security.
On Tuesday, Election Commission of Pakistan (ECP) through the notice told the PML-N that Nawaz Sharif can not lead the party after disqualification under the Political Parties Order 2002.
In his late night address to his supporters at Rawalpindi's Committee Chowk, Sharif called the apex court's decision to depose him last month a "joke" and an insult to voters.
In another challenge to the ruling PML-N, firebrand opposition cleric Tahir-ul-Qadri returned home after mainly living overseas amid pending court cases against him in Pakistan.