Dario recently did an interview with Croatian newspaper:

Here is my rough translation of the quote regarding Sixers.

"Next summer I will, probably, finally go where I want, to the biggest basketball league in the world, NBA. Imperative is to spend another year in Efes, and then is (time for) America. We have tried to do something this year, but since Efes demended for me to stay as an important player, I was forced to stay. Finally, I see the point in staying "

I think the translation is pretty accurate and he especially said that he was forced to stay, which of course implies he wanted to come over this year, so I dont think we should fear him staying another year in Turkey.