As one may expect, neither The Great One or Le Magnifique ever started an NHL season pointless in five games. Gretzky's worst five game start was 1996/97 when he collected a pedestrian four points in his first five games. In fact, Wayne Gretzky never ONCE went five games in a row without getting at least one point over his entire career. The closest he ever came to this was from March 22 to April 4 1999 when he received only one assist over a six game period. Of course he had played 1475 NHL games to this point and had less than three weeks left before retiring.
Mario Lemieux like Gretzky never started a season with less than 4 points in 5 games, which he did in 2001 and again in 2005. Conversely, Lemieux's best five game start to a campaign was in 1988/89 when he exploded for 19 points (9 goals, 10 assists). Gretzky's best five game start was in 1983/84 when he collected only 15 points (7 goals, 8 assists). As a comparison, Crosby's best start was in 2011/12 when he had 11 points (2 goals, 9 assists) in his first 5 games.
So, as much as Crosby is killing fantasy teams around the world with his poor start, it can't continue. He'll likely end up with close to 100 points when it's all said and done right near or at the top of NHL scoring.