The Expendables 3 may not have ignited the box office, but creator Sylvester Stallone isn't ready to put the action franchise to rest. However, that PG-13 rating is another matter entirely.

"I believe it was a horrible miscalculation on everyone’s part in trying to reach a wider audience, but in doing such, diminish the violence that the audience expects," he told CraveOnline. "I’m quite certain it won’t happen again."

Stallone also discussed the low hero mortality rate in the third installment, which he tied to the film's rating. "This is a big conflict for me because in an R-rated film it is difficult to believe that none of the heroes die," he said. "I personally just believe that the characters become identifiable and their demise could put a dark cloud over an audience exiting the theater after seeing the film. But that may change in Expendables 4 …"

On the subject of Expendables 4, Stallone commented on director Patrick Hughes' idea of sending them back in time to fight in World War II. "I have actually entertained the idea of putting the group into such an unnatural environment that it, in an of itself, creates extra suspense and tension: the 'fish out of water' scenario." Stallone said. "That environment might not be time travel, but nearly just as jarring."