New Japan just ran a couple of shows in Long Beach over the weekend. Many of their top stars are just hanging out and enjoying the long 4th of July weekend. RAW ran in Phoenix last night, which is only a quick 90 minute flight from Los Angeles.
So apparently, IWGP Heavyweight Champion Kazuchika Okada decided to see for himself what this whole WWE thing was about.
Okada being backstage at RAW will definitely start the speculation in full swing, but he has been backstage at WWE events in the past, and he didn't sign with the company then, so this is probably nothing.