Star striker says he'll do all he can to get to tournament.
The 26 year-old is one of his country's most recognisable stars and says he'll "fight for the chance" to perform on football's greatest stage.
''I think it's going to be difficult for us to qualify for Brazil,'' Soria told ESPN Soccernet.
''Last year we had a big chance to qualify for South Africa, and then we changed coaches in the middle of the final round of matches and had to start anew."
After a promising start to the qualifying campaign for South Africa under Uruguay coach Jorge Fossati, a managerial change was forced due to his health, with Bruno Metsu replacing him but failing to guide the team to the finals.
Something of a generational shift within the national team will now have to be addressed on the road to Brazil.
"Now new players are coming up and maybe it will be my last chance to play a World Cup in 2014.
"I think it will be the best age for me, 30, and I'll fight for that chance.''
Qatar will host the 2011 Asian Cup in January, where Soria has his immediate focus and is keen to see his star rise.
"I would love to be the top scorer of this Asian Cup, and make a name outside of Asia too.''