Are the Blackhawks experiencing a Stanley Cup hangover?

The Blackhawks won hockey's greatest prize last season, but have been mediocre thus far in 2015-16. Bruce Bennett/Getty Images

Last season, the Chicago Blackhawks won the Stanley Cup for the third time in six seasons in decisive fashion, losing only seven games throughout the playoffs. At the 15-game mark a few short months later, Chicago sits second-to-last in the Central Division.

Is this just a Stanley Cup hangover, or is something fundamentally wrong with the Blackhawks?