You don't know what he's going to do next.
Also, look at those crazy evil eyes. All that Liberation-ness.
Apparently, that's an official picture or something. I don't know anymore. And Team Rocket's reappearing? Oooooooh.
Also, in commemoration of N's appearing in the anime next year,
"On your first Anime Appearance!"
Delivered by Hilbert, Hilda, and Cheren, no less.