Chennai: Superstar Rajinikanth, who was out of action for nearly two months, will be back on the sets of upcoming Tamil sci-fi action drama "2.o" later this month. "Rajinikanth sir is fully fit and he plans to join the sets later this month. The producers had a courtesy meeting with him at his residence over the weekend. He had told them that he feels much better now and can join the team soon," a source close to the superstar said. Rajinikanth was on a month-long US trip with his daughter Aishwarya, and returned to India on July 24. As part of his vacation, the "Enthiran" actor is rumoured to have attended a detoxification programme. It is also reported that he underwent a surgery, but nothing is confirmed. The superstar spent some time in Satchidananda Ashram in Virginia. In filmmaker S. Shankar-directed "2.o", a sequel to 2010 blockbuster film "Enthiran", he returns as scientist Vaseegaran. "2.o", which is being made on a budget of Rs.350 crore, also stars Bollywood actor Akshay Kumar as the antagonist, apart from Amy Jackson, Sudhanshu Pandey and Adil Hussain.