I wouldn't count on it. Not saying it won't happen, but (unless you count Gist) he's at the bottom of the totem pole as far as bigs go. Last year he had Mahinmi and Ratliff behind him, this year those guys are gone and the Spurs added Tiago Splitter, who is automatically placed above DeJuan.
It makes for a fairly skilled, and experienced group of 4/5s, but something's gotta give minute wise, and regarding DeJuan the most I'll hope for (minute wise) is that he'll gain a few of Dice's minutes in the RS, and then trade them back during the playoffs. But, maybe Pop will fall out of the habit of overusing Bonner...finally.