Batti (57), a former MLA from Amarwada, reportedly died due to a cardiac arrest in a Bhopal-based hospital on August 2.
The senior Congress leader said he has been working to strengthen his party in the last four months and the fight was not with the BJP's achievements, but its organisation.
Kamal Nath backs Sonia's leadership, BJP says only 'headmaster's child' can get 1st rank in Congress
In a series of tweets ahead of the CWC meet, Nath said, "Any suggestion or insinuation that Sonia Gandhi's leadership is in question is absurd."
Pro-tem Speaker Rameshwar Sharma declared Nath, 73, as the leader of opposition.
Earlier in the day, Nath posted his picture clad in saffron on his Twitter profile.
All COVID-19 protocols will be strictly followed during the event, Congress spokesman Bhupendra Gupta said on Sunday.
Former Madhya Pradesh Kamal Nath is the first senior Congress leader to have come out in support of the Ram temple construction in Ayodhya.
The senior Congress leader claimed that the "BJP had violated corona guidelines so all the big leaders of the party were infected."
In a letter written to Modi, Nath mentioned that toppling his elected government four months ago was one of the most hated crimes that happened in the country’s democratic history.
There was an "undemocratic pandemic" prevailing in the country in which the BJP was luring away MLAs to topple elected governments in states ruled by opposition parties, MP Congress chief alleged.