Just because it says "Link's first adventure" doesn't mean anything. It means that it is that Link's first adventure. And, yes it is Ganon. I don't think there's any other giant pig villains in Hyrule.
I get really annoyed whenever people say that MC is first on the timeline.>:( Here are some reasons to disprove this theory:
1. In the BS of MC there is shown what is quite obviously Link saving Hyrule from Ganon. And in OoT, Ganon/dorf is trusted by the king.
2. Just because it shows how 1...