Despite being just a couple of months away from his 66th birthday, Sylvester Stallone is showing little sign of slowing down and settling into a nice, cosy retirement. Having completed principal photography on The Expendables 2 earlier this year, Stallone is currently filming The Tomb alongside fellow action icon Arnold Schwarzenegger and while The Expendables 3 is said to be on the cards for later in the year, it seems that Sly is also intent on bringing back Vietnam veteran John J. Rambo for one last hurrah.

“There’s a volcanic eruption [brewing]. The magma of Rambo is coming to the surface,” said Stallone in a recent interview with MTV News (via Den of Geek). “It’s one thing where you lay down the final culmination of your life where you can articulate it, but also act on it where he realizes what his destiny really is. It’s not to be a farmer, it’s not to be obscure; it’s to go out in a blaze of glory in a heroic fashion. But is he really doing it for himself or is he doing it because that’s just his id? That’s who he is.”

The last we heard, Conan the Barbarian scribe Sean Hood had penned a script entitled Rambo: Last Stand, which was described as “more in line with the small-town thriller of First Blood.” However, with Stallone now telling MTV that he’s “working on a formula” for Rambo’s next outing, it remains to be seen whether Hood’s screenplay will serve as the basis for the fifth movie, or if it’s gone the way of previous efforts such as (the frankly ridiculous) Rambo: The Savage Hunt.