Despite saying for years that he was working on a script for the fifth installment of the film, the 69-year-old actor said he was happy where 2008's "Rambo IV" left the character, reported Variety.
"The heart's willing, but the body says, 'Stay home!'It's like fighters that go back for one last round and get clobbered. Leave it to someone else. As an action film, I was very satisfied that it dealt with the Burmese situation.
"...It was so brutal, which civil war is, I was shocked they even gave me an R-rating. I didn't want to compromise. I said, 'This is probably going to be the last decent film of this genre that I'm going to do as a solo act.' When that was accomplished, I never felt the same willingness to do it again," Stallone, who first played the iconic character in 1982, said.
"I don't want to cast aspersions. But it's delicate to try to replace a character with his son. I've seen the son of Flicka, the son of Tarzan, the son of King Kong, the son of Godzilla. It's a very difficult premise," she said.