When MTV News caught up with Sylvester Stallone at Comic-Con in late July, he professed more than a little nervousness about the possible fate of [article id="1645778"]"The Expendables" at the box office[/article]. While Sly had hopes to shoot a sequel to his bombs-and-brawn throwback to '80s action blockbusters, he wasn't sure how everything would shake out and what his next project would be.

"It all depends on how this film does," he told us in San Diego. "Next thing might be directing at a parking lot, or it might be a film."

Now, it seems Stallone just might get the chance to shoot an "Expendables" sequel, after the first one opened to $35 million in ticket sales over the weekend. In a conversation with The Hollywood Reporter following the movie's big opening, Stallone said he knows exactly the direction a sequel would take.

"It's plotted out in my mind's eye," he said. "I believe this group has to continue to evolve; it just can't become the same people. So how do you get new people introduced into the group, and how do you have some of the other people leaving? Those are the challenges."

It was a challenge as well for Sly even to get "Expendables" made. He credited "Rambo" producer Avi Lerner for getting the flick a green light and called making "Expendables" one of his most satisfying Hollywood experiences.

"My proudest moment ever was not 'Rocky,' it was the last Rocky picture, 'Rocky Balboa,' " he said. "To be able to meet the challenge of completing that series after all these years, that was great. But this one here tops that -- not in an emotional way but for excitement. This should have never happened. Avi Lerner really took a big gamble on me with this when nobody else would. I know because I heard about it every day! He kept worrying about the reviews."

Check out everything we've got on "The Expendables."

For breaking news, celebrity columns, humor and more -- updated around the clock -- visit MTVMoviesBlog.com.