Okay. Just for the record - the specific bits being riffed on in this scene include -
"Baron Zoria and his Circle of Horns!" EDIT: Here's the author explaining things:
...the mental image of Baron Zoria & his Circle of Horns, ancient wizardy horn section for hire, sprang fully formed into my head as the result of a typo in a City of Heroes mission briefing, in which the contact cautioned the hero to beware of them. I instantly pictured them as a sort of Seat Belts/Diligent Circle of Ekoda-style rock/jazz/blues horn section, still styled exactly like the Circle of Thorns, but mystically obsessed with hot licks and cool jams instead of world domination. "Because you're perfect." - Buckaroo Banzai - the bit with "Perfect Tommy".
Marceline The Vampire Queen - One of the main characters from "Adventure Time".
The hunters are loosely based on Malta - just using tech cribbed from Ghostbusters - but the last scenario in the Nightclub has them shifting into the role of the State Troopers from "The Blues Brothers" (the night club scene). So they're kind of a 3-way mish-mash of elements.
And yeah - there's a little bit of context needed to really get the full effect of the humor, but I figured the "Circle of Horns" bit was hilarious all on its own, especially to us COH fans. And I figured people would get enough of the other references to get the humor - or at least to be curious enough to check out the fanfic if that's their thing.
Incidentally - the intent with the characters - particularly Marceline - is not to impose the mental imagery from their respective source material 100%. This is not meant as a "Who Framed Roger Rabbit kind of thing with live action and "toons". If it helps, imagine all the characters in a sort of semi-realistic "anime" artstyle.
I think a big chunk of the fun (at least for me) in Undocumented Features is the "spot the reference" game. Most of the time, it's pretty obvious and the theme is consistent. But occasionally the authors will throw in a little curve ball like that "Perfect Tommy" bit above out of left field and for some reason for me, a lot of the time, that's just intensely funny when the paradigm is poked like that.