If NaruSaku does take place, some SasuSaku would probably be like, "where the heck did that come from! Kishi-sensei pulled a DBZ on us."
I don't get it.
He's implying the SasuSaku shippers would think that NaruSaku happening would be a complete surprise, similar to the whole Bulma/Vegeta thing. However, there are subtle hints throughout the series that Sakura felt a little "something" for Naruto.