This is rumor control, here are the facts: none of the sources here appear to be reliable and though many majors are running the news as fact, others are calling foul. With our readers best interests in mind, I would strongly urge everyone to take the following with a grain of salt until anything is confirmed by Stallone or Lionsgate first hand.
With THE EXPENDABLES 2 doing boffo box office, rumor has it Lionsgate is giving Sylvester Stallone the go-ahead to adapt the James Byron Huggins novel HUNTER.
Stallone, who is purportedly set to write, direct, and star, has been pursuing the project for several years now and at one time intended on making it as RAMBO V. That idea was trashed, but the news story in question claims RAMBO V is also under development (albeit with a completely different storyline) and could also be filmed just before HUNTER.
As for the book adaptation, HUNTER sounds like a Stallone-ian variation of PREDATOR, albeit with much higher, apocalyptic stakes. See the synopsis below for more on that and check back to see whether or not Sly is actually gearing up for the hunt everyone is talking about.
Nathaniel Hunter could track anyone, or anything, on Earth. Now the military desperately needs him for a mission that his ultra sensitive instincts tell him he should refuse. A beast is loose somewhere north of the Arctic Circle. It has already decimated a secret research facility and annihilated a squad of elite military guards. And the raging creature is headed south toward civilization, ready to wreak bloody devastation. It is a job Hunter cannot turn down, but he soon discovers that his prey is terror incarnate, a half-human abomination created by a renegade agency through a series of outlawed genetic experiments. It has man's cunning, a predator's savageness, and a prehistoric power that has transcended the ages. And even if Hunter survives its unrelenting hunger for human blood, he'll still have to confront the grim reality that it may have grown immortal.