User blog comment:Joekido/Chapter 490: Oda's big suprise/@comment-5729687-20131231072339

I read One piece Manga from the beginning for old time sake and there is way too many things already foreshadowed ever since the beginning.

An example is what Zeff (Sanji's mentor) told luffy about the grandline that some people called it "paradise" even though we just saw Don Krieg pirates got decimated just a few days after entering grandline. We then found out later after enies lobby that the second half of grandline called the "new world" which is much more dangerous making the first half looks like a safe haven.

There are also others like the story of Laboon during the alabasta saga and it resulted to the joining of Brook. Even the battle of marineford was already started to build up ever since the conversation between whitebeard and rockstar.