Howtophil actually became a zombieThe episode made just before Halloween shows a zombified Howtophil. It's not just stage and Halloween makeup, he really did become an undead terror.
Joe Tableaux is obfuscating stupidityHe pretends to be a spaced out pot head but is actually hyper aware of everything that is going on all the time. He is aware of so much that it's often hard for him to concentrate.
Sid D. Nerd will eventually try to take down all other internet video nerdsSid will go on a caffeine fueled rampage and try to take out all competition for web nerd god status.
The puppets are planning to brainwash everyoneIt all starts with Grendle's review of that "ways to be persuasive" book and will spiral out of control from there.