lol why would they give DC a challenging match-up?? They will give him a tune-up fight at 205 of a guy that is well known and respected but not a world beater. I could see Ryan Jimmo if he wins or James Te-Huna, maybe Thiago Silva (I don't he'd be dumb enough to take the fight at this point in his career).
DC is a fan friendly guy and can be marketed as former Olympian, which means he could potentially bring a decent PPV # for the UFC. With a lack of challengers at 205 (with the exception of Gus), the UFC would not be dumb enough to risk Rashad beating a weight cut depleted DC before they can make $$ off of him.
Business first folks, the UFC doesn't give a shizzle if DC beats a top 5 guy first...