Question: Was The World's Greatest Athlete or Invincible released first?

Context articles: Australia's Greatest Athlete (season 1)
Australia's Greatest Athlete
Billy Slater
Invincible (2006 film)
Gene Kiniski
Bennie Oosterbaan
The World's Greatest Athlete
Bob Foxx
John Levi
Dwight Eddleman

The first season of Australia's Greatest Athlete was broadcast on the Nine Network and hosted by Andrew Voss and Michael Slater, with Ricky Ponting as a sideline commentator.
 It was sponsored by Rexona, which had naming rights to the show.
Australia's Greatest Athlete is an Australian television program that debuted in 2009.
 The first season was broadcast on the Nine Network and was hosted by Andrew Voss and Michael Slater, with Ricky Ponting as a sideline commentator.
 The second season moved to Channel Seven and was hosted by Mark Beretta and Tom Williams, with Ponting returning as a sideline commentator.
 Season three was hosted by Mark Beretta and Wendell Sailor, while Billy Slater and Mark Webber replaced Ricky Ponting as the sideline commentators.
William Slater is an Australian professional rugby league footballer who currently plays for the Melbourne Storm of the National Rugby League (NRL).
 An Australian international and Queensland State of Origin representative fullback, he has played his whole NRL career to date at Melbourne, with whom he set the club record for most ever tries and NRL record for most ever tries by a fullback.
 Slater has amassed 182 NRL tries during his career which is currently 2nd most of all time, behind Ken Irvine.
 Slater has also won two grand finals, the Clive Churchill Medal and the Dally M Medal with the Storm.
 With the Kangaroos he was the 2008 World Cup's top try-scorer and player of the tournament and won the 2008 Golden Boot Award as the World player of the year.
 Slater was also the winner of the television game show "Australia's Greatest Athlete" in 2009 and 2010.
Invincible is a 2006 American sports drama film directed by Ericson Core.
 It is based on the true story of Vince Papale (Mark Wahlberg), who played for the Philadelphia Eagles from 1976 to 1978 with the help of his coach, Dick Vermeil (Greg Kinnear).
 The film was released in the United States on August 25, 2006.
Eugene Nicholas Kiniski (November 23, 1928 – April 14, 2010) was a Canadian athlete who played football for the Edmonton Eskimos and later was a successful professional wrestler recognized as a multiple-time World Heavyweight Champion.
 "Canada's Greatest Athlete", as he billed himself for promotional purposes, was born in Edmonton, Alberta.
 Like Bronko Nagurski before him, Kiniski was one of the first World Champions in professional wrestling to have a previous background in football.
 He is the father of professional wrestler Kelly Kiniski and international amateur/professional wrestler Nick Kiniski.
Benjamin "Bennie" Oosterbaan (February 4, 1906 – October 25, 1990) was a three-time first team All-American football end for the Michigan Wolverines football team, two-time All-American basketball player for the basketball team, and an All-Big Ten Conference baseball player for the baseball team.
 He is widely regarded as one of the greatest football players in Michigan history.
 He was selected by "Sports Illustrated" as the fourth greatest athlete in the history of the U.S. state of Michigan in 2003 and one of the eleven greatest college football players of the first century of the game (ending in 1968).
The World's Greatest Athlete is a 1973 American feature film released by Walt Disney Productions.
 It starred John Amos, Roscoe Lee Browne, Tim Conway, Dayle Haddon, and Jan-Michael Vincent.
 It is one of the few wide-release Hollywood sports films to look at the world of track and field, as the "World's Greatest Athlete", Nanu, played by Vincent, tries to make history by winning every event at the NCAA Track & Field Championship.
Robert "Bob" Foxx (born c. 1919) was an American football player.
 He played college football for the Tennessee Volunteers football team from 1938 to 1940 and was selected by the International News Service as a second-team player on the 1940 College Football All-America Team.
 In a poll of "Knoxville Journal" readers, Foxx was voted Knoxville's greatest athlete of the first half of the 20th century.
 He was inducted into the Tennessee Sports Hall of Fame in 1968.
 He played minor league baseball in 1941.
 He also was hired as an assistant football coach at Tennessee in 1941.
John "Skee" Levi (June 14, 1898 – January 22, 1946) was an Arapaho Indian athlete, playing college football for the Haskell Indians.
 Allegedly Jim Thorpe called him the greatest athlete he'd ever seen.
 He then coached at his alma mater.
Thomas Dwight "Dike" Eddleman (December 27, 1922 – August 1, 2001) is generally considered the greatest athlete in the history of athletics at the University of Illinois.
 Eddleman participated on the University's basketball, track and field, and football teams between the years of 1947 and 1949.
 Eddleman earned a combined 11 varsity letters in his career at the University, during which he also became a member of the Sigma Chi fraternity.
 Eddleman was born in Centralia, Illinois, and attended Centralia High School.
 On October 24, 2008 Eddleman was named a Distinguished Alumni of Centralia High school.
 He, along with five others, including James Brady, were the first to be named Distinguished Alumni.
 His wife, Teddy Eddleman, accepted his award.