The most successful actors are masters of self-promotion, the kind of guys who enter "salesman mode" every time they speak. That's why it's important to take anything an actor says with a grain of salt. Unless someone else has confirmed it, any potential news that emerges from the mouth of a thespian could very well be that actor just trying to keep himself in the public eye. So, if I were to tell you that Neil Patrick Harris recently told MTV that the Dr. Horrible's Sing-Along Blog sequel will be a full-length theatrical film, you should grab the salt shaker.
Dr. Horrible's Sing-Along Blog was writer-director Joss Whedon's answer to 2008's writers strike: a low-budget three-part short film/online series following the titular mad scientist (Harris) as he pursued the girl of his dreams (Felicia Day) and battled his superhero nemesis, Captain Hammer (Nathan Fillion). And it's a musical. And it's friggin' great.
The initial launch of Dr. Horrible pretty much broke the internet, and now Apple can buy an Eastern European nation with the profits from iTunes sales. Although Whedon, of Buffy the Vampire Slayer, Angel and Firefly fame, can be divisive (people either want to be his best friend or kick his teeth in), it's impossible to deny that this project, a unique beast in presentation and distribution, made an impact. There were even film, TV and Broadway offers. A sequel was inevitable.