OK, so, let's discuss a few things.
First, the Candy Kingdom's got helicopters? Now all they need are jet fighters and they can take down the Nut Kingdom!
Second off, the rogue cookie. Here's what I think he's trying to do:
He's trying to steal PB's crown because he's working for The Lich-possessed Snail. Since the crown can protect PB from The Lich's mind control, so he's stealing the crown to take away that protection.
Third, PB said things are about to get mean, and radios someone. Who did she radio? Maybe she radioed Marceline, or the Marine Corp, or maybe even Flame Princess (maybe FP decided to take after Finn in her time outside the Fire Kingdom and be a defender of the weak).
What do you guys think?