rbs6nations.com > Wales
Rees' last appearance for the 2013 RBS 6 Nations champions Wales was in February last year.
But former Wales captain Rees says the 2015 World Cup - to be hosted in England - is a realistic possibility.
"I was unfortunate to miss the last one through a neck injury," Rees told Wales Online.
"That is an end goal of mine, to make that World Cup squad.
"It's about putting big performances in back on the park and, hopefully, selection will take care of itself then.
"It's been a frustrating first season for me at the (Cardiff) Blues, but that's life. You've just got to move on and learn from it.
"But more than anything, I'm just glad to be back involved and it's about enjoying my rugby."