The AS Roma striker quit the national team after their 2006 World Cup triumph but coach Marcello Lippi has consistently said he would consider the 33-year-old for the June 11-July 11 tournament in South Africa if Totti reverses his decision.
"I don't know if I'll come back because I still haven't spoken to Lippi and then I've got to check my fitness," he told Canal Plus TV.
"Then I'd have to see if the team wanted me, so it's one thing after another."
Alberto Gilardino has been Lippi's main striker during the past two years and Juventus forward Vincenzo Iaquinta, hit by injury this term, can expect to be on the plane if fit.
Antonio Di Natale is Serie A's top scorer with 22 goals despite playing in a struggling Udinese side.
Other strikers vying for a spot include Sampdoria's Giampaolo Pazzini, Napoli's Fabio Quagliarella, AC Milan's Marco Borriello, Villarreal's Giuseppe Rossi and Totti's Roma team mate Luca Toni.
