Why does the Zelda series exclusively focus on Ganondorf as an antagonist?

[Asriel]

nordlead said:
Anyone who doesn't want Zelda, Link, and Ganon need to go back, play some Zelda, and study the Triforce. If Nintendo ever tossed Bowser or Ganon because you people can't enjoy such great games, I will be really sad.

Agreed.

 

Ganondorf is a brilliant villain. He's an immortal demigod and an important part of what makes Zelda brilliant. I'd like to see him in Zelda Wii as the main villian through the entirety of the game. And if the Master Sword is a big focus of the game (which it looks at this point it will be) then I'd expect Ganondorf to have a strong presence in the game. I wouldn't mind other villains being in the game, but Ganondorf is the Big Bad.