Jackie Chan and Jaden Smith in 'The Karate Kid' (2010)Will Smith has been the savior of the summer box office more than a few times; now it's his son Jaden's turn.

The upset victory of Jaden Smith and Jackie Chan's reboot of 'The Karate Kid' over fellow '80s update 'The A-Team' was not only unexpected but came at such a huge margin ('Kid' debuted at an estimated $56 million, more than twice the $26 million opening for 'Team') that it made the spawn of Smith look like a new box office hero, capable of defeating rival franchises - and the current summer box office slump - with a single roundhouse kick.