Apologies for this taking slightly longer to go up than usual.
As for random design notes, yes, the sock puppet makes this a loose homage to a certain Canadian duo who are not only politically incorrect (well, the sock puppet anyway) but also hilarious and generally right on the dot. Though these characters are far, far less explicitly rated.
And the whole “sock puppet” angle exists simply because Jeff Bennett’s announcer voice on the recap bumpers of Legend of Korra is awesome and needed inclusion somehow. And so we have Jeff the sock puppet.
Don’t be surprised if another puppet named Tom shows up, either. I quite like Tom Kane’s intro bumpers on The Clone Wars as well.