To sum this up:

1) Link begins the game without a hat. He does so in two other games (TWW, TP). Big deal.
2) Link does start the game with a green tunic, whereas he doesn't in TWW and TP. Something is different in this case; tunic, but no hat?
3) Link soon encounters Ezlo, in the shape of a hat, who becomes your sidekick throughout the game, and serves as Link's cap.

Possible conclusions:
1) Ezlo serves as the first hero's cap.
2) The hero in this story begins without a cap because he will obtain Ezlo, who is a cap.

1 is possible, not fact; 2 is fact.
1 requires speculation; 2 does not.

__________________


I love my Moonlight, my beautiful fiancée and ZU wife, my darling Kassi <33
Metroid: Disaster