The Bulls are likely to have multiple rookies and fringe players on the roster next year, coming from either our own draft picks or as filler to plug up the bottom of the roster after some kind of a major acquisition.
We won't be sending them to Iowa anymore, though, as the Iowa Energy are now single-affiliated (and share some ownership with) the Memphis Grizzlies.
The D-League is now down to just one single unaffiliated team. Seventeen of the eighteen D-League teams now have shared ownership or affiliation with a single NBA franchise.
Thirteen NBA franchises -- including the your Chicago Bulls -- have decided that a minor league affiliate is a luxury they can't possibly afford and will have to park players with the last unaffiliated D-League franchise, Fort Wayne. Which will give them even less control than the had in the past.
Other franchises have been buying or affiliating themselves to single D-League teams at an increased pace. Why Forman, Paxson and the Reinsdorf Family have shown such a strong aversion toward the D-League is open to question (but mostly it's because they're cheap short-sighted jerks).