Rambo is an upcoming 2008 film starring Sylvester Stallone as Vietnam War veteran John Rambo. It is the fourth chapter of the Rambo franchise.

When a group of missionary aid workers in Myanmar disappear into the vast green inferno, vigilante Vietnam War veteran John Rambo (Sylvester Stallone) leaves his job as a Salween River boatman behind to accompany a group of mercenaries on a daring rescue mission. It's been twenty years since Rambo helped mujahedeen rebels fend off Soviet invaders in Afghanistan, and these days the former soldier lives a simple life in northern Thailand. Yet despite the fact that Rambo has long since traded his guns for a fishing reel, the world's longest running civil war rages into its sixtieth year on the nearby Thai-Burma border. It seems like every day more rebels, mercenaries, medics, and peace workers cross through the remote village where Rambo lives, most of them never to be seen again. One day, human rights missionaries Sarah (Julie Benz) and Michael Bennett (Paul Schulze) show up asking Rambo to guide them up the Salween so they can get some much needed food and medical supplies to the desperate Karen tribe. According to Sarah and Michael the Burmese military has planted landmines all along the roads leading into the tribe's village, making it virtually impossible to reach the tribe via land. At first Rambo flatly refuses to cross into Burma, but these refugees will most certainly die without aid and he eventually relents. Two weeks after Rambo drops the group off in dangerous territory, pastor Arthur Marsh (Ken Howard) arrives with a chilling message: the aid workers never returned from their mission into the jungle, and the embassies refuse to help Marsh and his fellow missionaries find their missing friends. Pastor Marsh knows that Sarah, Michael, and the rest of the missing missionaries are being held hostage by the Burmese army, and in order to hire the mercenaries needed for a rescue mission he has mortgaged his house and taken up a special collection from his congregation. Now, despite the fact that Rambo has long since sworn off all forms of violence, the knowledge that innocent missionaries are being used as pawns in a brutal war leaves him with no other choice than to venture behind enemy lines on his most dangerous mission to date. Sylvester Stallone has described the film as "sort of like Beyond Rangoon, but with rocket launchers."

The film has been given an R rating from the MPAA for strong graphic bloody violence, sexual assaults, grisly images and language.

So far the most recent installment of the Rambo franchise has undergone many name changes, and has been known as the following

John Rambo - mirroring the final installment of the Rocky Franchise, Rocky Balboa. This is still the title being used in Germany, Spain and Italy, because First Blood's original title in these countries is Rambo.

Rambo IV

Rambo IV: In the Serpent's Eye

Rambo IV: Pearl of the Cobra

Rambo: To Hell and Back - On October 12, Lionsgate announced that the film title was being changed to Rambo: To Hell and Back. After some negative feedback from the online community, Stallone spoke with AICN's Harry Knowles and is quoted to have said:

"Lionsgate jumped the gun on this. I just was thinking that the title John Rambo was derivative of Rocky Balboa and might give people the idea that this is the last Rambo film, and I don't necessarily feel that it will be. He's not an athlete, there's no reason he can't continue onto another adventure. Like John Wayne with The Searchers."