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Everyone forgets this stuff, from his Wikipedia article: “Adopting the new villainous persona of "Rainmaker", Okada changed the Japanese writing of his ring name from "岡田かずちか" to "オカダ・カズチカ". Okada described his new persona as a combination of the three professional wrestling styles he had learned, stating that he took his dropkick from Mexico, his "fighting spirit" from Japan and the "TV and the entertainment" from the United States.”
He’s going to NXT, “three styles = three faces” and there was reports that this was the way he was entering WWE a few weeks back. I don’t know if he’s debuting before or at Stand and Deliver though, might be some sort of “mystery opponent” angle set up for him.