i saw the movie Sid&Nancy like ten times, and Gary Oldman was amazing (well, he is an amazing actor). but the story in the movie is just too naive, it's based o facts, but on what people wanted to see.
not to mention that when you watch the movie you gt a feeling that rotten had a crush on sid...
sid's death did made him a hero, a legend, but maybe he would become legend even if he haven't met nancy. like rotten.