The rally at Delhi's Ramlila Ground is being billed as a show of strength by the Congress with Prime Minister Manmohan Singh, Congress president Sonia Gandhi, party general secretary Rahul Gandhi being the star speakers.
The party appears to have already gone into battle preparedness for the next Lok Sabha elections - scheduled for 2014 - and Sunday's rally would be followed by 'Samvad Baithak (dialogue session)' on November 9 at Surajkund on the outskirts of Delhi.
The party is pulling out all stops to make the rally a success with Congress ruled states of Delhi, Haryana and Rajasthan putting in extra effort to ensure "huge" participation.
A large number of people have already started arriving from the neighbouring states, especially Haryana.