In the two years since director John Singelton dropped out of the project, the long-developing biopic of Tupac Shakur has progressed no further. Both Singleton and his predecessor Antoine Fuqua reportedly moved on after failing to find the perfect actor to fill the Tupac's sneakers. But the film has clearly remained much on Singleton's mind, leading to this morning's news that he's now attached to direct, produce and write it once again. Tupac , as if you need telling, was a hip-hop superstar, with albums like Me Against the World, All Eyez on Me and The Don Killuminati all achieving multi-platinum status. He was also building an extremely credible acting career before his untimely death in a drive-by shooting in 1996. The murderer has never been officially identified (although Nick Broomfield's Biggie & Tupac posits some pretty credible theories) and the case remains unsolved. Singleton at the helm of the biopic has always made a lot of sense, since he