( CNN ) -- It 's an `` epic '' first , ushering in `` one of the most incredible sports stories '' of our time . The result of a storied brotherly rivalry . Leading up to Super Bowl Sunday , some sports columnists and football aficionados are having a field day with the `` Harbowl . '' John Harbaugh , coach of the Baltimore Ravens , will face off against his 15-months-younger brother Jim , head coach of the San Francisco 49ers . Top 20 sibling rivalries in sports . Some football fans are complaining that the storyline is overhyped . And the brothers themselves reject it , emphasizing their bond . Still , the super siblings will make history when their teams duke it out this weekend at the Mercedes-Benz Superdome in New Orleans . People all over the world love a good story of a brotherly feud , whether fictional or real . We decided to take a look at some of the biggest ones . The Bible . Cain and Abel . Jacob and Esau . Joseph and his brothers . Moses and Pharoah ( they grew up together ) . Not to mention Isaac and Ishmael . If you 're looking for brother vs. brother rivalry , no better jumping off point than the Old Testament . Thor vs. Loki . Comics and cartoons are home to numerous good vs. evil battles represented by two archetypal brothers . See the Lion King 's Mufasa vs. Scar . Or the story at the core of last year 's record-breaking blockbuster `` The Avengers , '' based on Marvel comics . Loki , Thor 's evil adopted brother , tries to terrorize all of humanity . J.R. vs. Bobby . Sometimes you just loving watching the bad guy . On `` Dallas , '' conniving J.R. Ewing was forever squaring off against his good-guy brother Bobby . The show 's been resurrected with that battle at the center . But with Larry Hagman 's death , J.R. vs. Bobby -- probably the biggest brother vs. brother rivalry in TV history -- will likely end as well , after the episodes Hagman already shot for the new season that began this week . ( Coincidental corporate synergy alert : The new `` Dallas '' is airing on TNT , which , like CNN , is a part of Time Warner . ) When brothers disband . Brotherly feuds have poisoned the waters for successful musical acts , including the Everly Brothers , which Rolling Stone calls `` Rock 's First Sibling Rivalry . '' And more recently , similar bitterness helped bust the popular band Oasis . Liam and Noel Gallagher 's feud included public spats and legal action . ( See also The Kinks , the Isley Brothers and more in this spread from zencollegelife.com . ) Battle of the billionaires . Who does n't hate feuding with their billionaire sibling over the future of a massive empire ? So we can all commiserate with Mukesh and Anil Ambani , who split up their father 's Reliance Group and have fought to see whose vision for the future of Indian business will prevail . Brotherly love trumps competition . I 'll never forget watching the 1984 Olympics as a kid . Twin brothers Phil and Steve Mahre won gold and silver in the slalom at Sarjevo . After Phil finished his race , he used a walkie-talkie to give hints to his brother . I remember thinking , he wants his brother to do well more than he wants to be able to say he beat him . So , while rivalries abound , brotherly love can win out . Sisterly feuds just as strong . We could of course double this list by looking at rivalries between sisters as well . A big one that 's been in the news lately : Pauline Phillips , advice columnist behind `` Dear Abby , '' passed away last month . Her twin sister was the equally famous advice columnist Esther `` Eppie '' Pauline Friedman Lederer known as `` Ann Landers . '' They were locked in a feud for years . Biggest sibling rivalries - join the discussion on Facebook . What other sibling rivalries stick out in your mind ? Let us know in the comments below .
For the first time , two sibling coaches will face-off in a major sports matchup this Sunday . The game is between the University of Michigan and Notre Dame at noon on ABC ( or whatever ). Brother-versus-brother is a common theme from the Bible to network TV .