His last bout was with his protègè-turned-rival Tommy Gunn in Rocky V. Now, more than 15 years on - and 30 years since first putting on his boxing gloves - Rocky Balboa is making another comeback. Hollywood sources confirmed last night that Sylvester Stallone has agreed to star in the sixth instalment of the Rocky saga. Filming starts in Los Angeles in December and Stallone, who will turn 60 next year, is also lined up to direct. A spokesman from the star's agent Paul Bloch said: 'There is a script, but it has yet to get the green light.' This...