The players will undergo a preparatory camp from March 9 at Major Dhyan Chand National Stadium here.
Both Sandeep and Gurbaj have remained out-of-favour since India's disastrous Olympics outing in 2012.
Goalkeeper P T Rao has been axed due to his indifferent form, and replaced by Harjot Singh who played for debutants Kalinga Lancers in Hockey India League.
Other players in the list include midfielders Gurinder Singh, Vikram Kanth, Jasjit Singh and young forwards Talwinder Singh and Lalit Upadhyay.
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The month-long camp will end on April 10.
India are placed in Pool A of the FIH Hockey World Cup with Australia, England, Belgium, Spain and Malaysia. India will open their campaign against Belgium on May 31 followed by matches against England (June 2), Spain (June 5), Malaysia (June 7) and Australia (June 9).
Probables list:
Goalkeepers - PR Sreejesh, Harjot Singh, Sushant Tirkey
Defenders - Gurbaj Singh, Rupinder Pal Singh, V R Raghunath, Birendra Lakra, Gurmail Singh, Kothajit Singh, Khadangbam, Gurjinder Singh, Gurinder Singh, Sandeep Singh, Vikram Kanth.
Forwards - Nikkin Thimmaiah, Nithin Thimmaiah, S V Sunil, Mandeep Singh, Akashdeep Singh, Ramandeep Singh, Affan Yousuf, Yuvraj Walmiki, Talwinder Singh, Lalit Upadhyay.