If you already watch the video here, next step is to read the comment from the guy who claimed that Oda made a short summary of One Piece, and that short summary probable stolen. Here is the prediction based on that short summary.

This theory is 100% true. I hated my self when I read it years ago because of the spoilers before Ace died and all the stufs that happened. Oda made Short Summary of things that will happen, maybe it was stolen by that guy read it because all what he said is becoming true and this is fucking crazy and this is not all there is more he mentioned. This is a spoiler believe me :

• Law will lose his eye in the war against Kaido
• Chopper will die by the hands of Kaido. 
• The girl in chapter 795 will be the new cutie of the straw hats.
• Kaido is a suicidal man because he lost his Son. He have also a daughter.
• Kaido is Zoro's father.
• Zoro will kill his father, after Kaido kill chopper, luffy will help zoro to kill his father kaido.
• when Luffy and zoro beat kaido luffy, will get capture by smoker and sent to impel down , Sabo and the straw hats will rescue him.
• Bon clay will join the crew.
• Sanji will get his moment with big mom and zoro with kaido
• Big mom will kill JINBEI and Luffy will destroy her with Sanji.
• BIG MOM know everything about sanji
• Sanji was hiding a big thing to the straw hats about his past
• Blackbeard will star a war against the marine and win it
• Shanks will give a scare to blackbeard in his eye .
• Black beards will kill Shanks and become the PK , but for a very short time .
• AT THE FINAL WAR SANJI WILL BE DYING AND HE WILL SAY TO LUFFY TAKE TO THE SEA I WANT TO SEE ALL BLUE.THEN HE WILL DIE SMILING ( It will be an interesting death like robin said ) 

This is not my speculation , it was made by that guy. Moins