By Chris Bernucca We all remember last year’s free agency extravapalooza – LeBron James, Dwyane Wade and Chris Bosh heating up South Beach, Amar’e Stoudemire making the Knicks relevant, Dirk Nowitzki and Paul Pierce making career commitments to their teams and Joe Johnson landing the biggest contract of them all. Next year could be a quality sequel, with a star-studded cast that includes Dwight Howard, Chris Paul, Deron Williams, Ray Allen, Jason Terry, possibly Jameer Nelson and Gerald Wallace, and oldies but goodies Kevin Garnett, Tim Duncan and Steve