It looks like the hammer hasn't quite fallen on the prospect of a "Dr. Horrible's Sing-Along Blog" sequel. For Joss Whedon fans who've been wondering whether they'll see another song from the 2008 geek-musical-web-series hit, there's some consoling words from Whedon: Definitely, maybe... but not now.

Originally created during the infamous Writer's Guild of America strike in 2007-2008, "Dr. Horrible's Sing-Along Blog" was a much needed and welcomed reprieve for writers and viewers alike. The independent project, funded by Whedon, starred Neil Patrick Harris, Nathan Fillion, Felicia Day and Simon Helberg.

"Dr. Horrible's Sing-Along Blog" tells the tale of Dr. Horrible (Harris) who is trying to get into the Evil League of Evil, creating a musical vlog series of his personal quest. However, his plans to become the evilest evil are continuously thwarted by the ever aloof Captain Hammer (Fillion), and his unrequited love of Penny (Day). Moist (Helberg), his sidekick, is also there to "dampen" the situation and assist with Dr. Horrible's schemes.

During Whedon's panel at Comic-Con International in San Diego, the filmmaker admitted that further developments on the sequel had been delayed due to his team's roles in other projects and his own efforts. The show's collaborators -- Zack Whedon, Maurissa Tancharoen and Jed Whedon -- are all busy, especially Jed Whedon and Tancharoen. "They are busy running a show that I am executive figurehead of," Whedon said, nodding to "Marvel's Agents of S.H.I.E.L.D."

However, the desire to pick up Captain Hammer and Dr. Horrible's story is still there, should the opportunity present itself. As Whedon has previously stated, the script for the project is already written. At SDCC he mentioned that the project would indeed be a sequel and not a prequel to the previous effort, posing opportunities to explore other characters within their world such as the forces behind the Council of Champions and the Evil League of Evil. And, the writer teased, if and when the project is made, it will open up with the title character as "the king."

In a prior conversation with CBR, Whedon admitted some link between Dr. Horrible's sequel and prior Dr. Horrible comics. While the sequel wouldn't be following direct storylines from the beloved "Horrible," a trade paperback collection of all comics in the Dr. Horrible world published by Dark Horse, "there is a certain organization introduced in the Evil League of Evil comic that will play a role in the sequel, if and when we get that off the ground."