Llamas with Hats/WMG

The next video will have Carl doing something to the moon.

 * Because really, after blowing up a city, what's left but space?
 * Well, he's got the whole rest of the planet to go through. I'm sure he'll think of something.

Carl made the dragon and sold it to Pink and Blue.

 * That dragon from the first "Charlie teh Unicrons?" Pink and Blue both said they ordered it. The third "Llamas" video has Carl collecting orphan meat to make a giant meat dragon. Why not sell it to those crazy kids and have a handy way to make some money?

Carl is the furry version of The Medic.

 * Or at least his German version is.

Carl doesn't act like that on his own- it's his hat.

 * It's controlling his mind, and, after Paul finally kills Carl, it will switch to another person and continue its rampage of destruction.
 * As an extension, Paul is the exact same way, and is extremely absent-mindedly trying to restrain the Carl-hat's violence. Both of the llamas are actually perfectly ordinary nonsapient llamas, its the hats that have human-level intelligence.

Carl will bring about the apocalypse on December 21, 2012.

 * And a voice will cry out...."Caaaaaaaaaaaaaaaaaaaaaaaaaaaarl!"