There is nothing more awesome than superheroes, supervillains and superstars singing and dancing their hearts out. So, with that in mind, the second installment of The Comic-Con Experience 2008 is Dr. Horrible’s Sing-Along Blog. A web-based production directed and co-written by Buffy the Vampire Slayer creator Joss Whedon, starring Neil Patrick Harris (forthwith known as NPH), Nathan Fillion and Felicia Day, Dr. Horrible is something that, superficially, has nothing to do with horror. But, for our purposes, we’ll pretend it does. Because I say so.