SPECIAL PREMIERE: Here’s an obvious bit of network street-fighting nastiness. On the same night and time that ABC tries to relaunch former Fox hit American Idol, Fox counters by presenting a special it’s been promoting heavily, and one for which the tune-in curiosity factor is at least as formidable. This special is built around a program that Fox had recorded, and scheduled to run, back in 2006, featuring O.J. Simpson being interviewed by publisher Judith Regan in a “hypothetical” conversation titled If I Did It.  Simpson’s ex-wife, Nicole Brown Simpson, and Ronald Goldman had been brutally murdered in 1994, with O.J. Simpson accused of the murders and tried. In 1995, he was found not guilty. And 11 years later, Fox planned to release a special, and Regan a Simpson book, asking the former football star to talk about what might have happened had he… well, you get it. And the outcry from the general public then, and from Goldman’s family (who didn’t want O.J. profiting in any way from the murders), was strong enough to scrap the project – a rare instance, those days, of the Fox network exhibiting good taste. Well, somehow, seemingly out of nowhere, here it comes again. That long-shelved footage has been repackaged as a new Fox special, hosted by Soledad O’Brien and overseen by producer Terry Wrong, whose resume up to this point, in such ABC documentaries as Boston 24/7, has been both impressive and free of controversy. Part of that streak, at least, just ended. But supposedly, since no proceeds from this special go to Simpson, the Goldman family has no problem with this unexpected peek into the mind of the man accused of killing Nicole.