User blog comment:Kaido King of the Beasts/A Rival for Luffy/@comment-24850639-20160119170756/@comment-25501246-20160119191248

Kid respects Luffy a lot thanks to his atittude in regards to the Celestial Dragons. He seems more interested in surpassing him than actually killing him. Considering that they've already worked together, I think it's very hard for Luffy to see him as an enemy. In fact, Luffy was happy to see him doing well.

With this in mind, Kid actually fits all 3 criteria.

I say Kid will eventually develop into Luffy's most traditional rival. Kid has his own alliance as well and is consistently portrayed as being one of the top supernova.