http://www.serebii.net/anime/pictures/intro/012.shtml
These pictures show off the 'new theme song' for the Diamond and Pearl in Japan. Makes me wonder...are they going to revamp it for us later on? Anyway, it shows off Zoey, that boy rival for Dawn, Paul for Ash, and then Misty, May, and Gary, like maybe they're going to make additional appearances in the new season!
You got to check it out. It also shows off Team Galactic as possibly their story may be coming out too.