Legendary Films held their first ever Comic-Con panel today kicked off their inaugural run with aplomb, bringing out plenty of A-list talent and displaying concept art for four different projects.The most anticipated of these films is likely Guillermo Del Toro’s Pacific Rim, a monsters versus robots yarn starring Charlie Day, Charlie Hunnam, Idris Elba and written by Travis Beacham. Del Toro brought out his actors and his writer to discuss the project, which he promises will have:

“The finest fucking monsters ever committed to screen.”

Hit the jump for the details.

Pacific Rim is still very early in development so we didn’t get to see any footage or even concept art for the monsters or robots, but we did get a peek at the film’s title treatment, which is metallic red lined with gold and features more lens flairs than J.J. Abrams Star Trek reboot.

We also saw an emblem, which is likely related to the robots. It’s a gold circle with a giant eagle with wings outstretched underneath a five-pointed star. Underneath the eagle is a series of line that roughly make the shape of a lowercase “q” and a lowercase “p” intersecting with a capital “A”.

“Only because I am barren, otherwise I would bare Legendary’s child,” said Del Toro as the panel opened. Before adding, “Applaud the balls, always applaud the balls.”*

The film began life as an idea from screenwriter Beachman, who Del Toro was driving around town because the scribe did not own a car. “I realized a couple of years ago that my favorite movie of all time had not yet been made,” Said Beachman. “And I look around at this team and I think we’re making it.”

The real appeal for Del Toro was not the monsters vs. robots angle so much as a big reveal of the how and why of the monsters. “As we developed the pitch into a movie I became jealous of whoever the asshole who was going to get to direct this would be.”

Again heaping praise on his producers, Del Toro explained that he was allowed to cast the film as a fan. Instead of looking for name actors he was permitted and encouraged to find, “The perfect fucking actor for the role.”

One of these actors is Day, who is most famous for his role as Charlie on FX’s It’s Always Sunny in Philidephia. While Day entered the theatrical game this summer with his starring role in Horrible Bosses a big budget action film is a bit out of his wheel house. Apparently he got the role because of his grizzled Vietnam vet-style speech in the It’s Always Sunny episode, “Charlie, King of the Rats”. In exchange for starring in Pacific Rim, Del Toro plans to cameo in the series as a drunken wino sitting in the corner.

Beyond big action and detailing the intricacies of monster anatomical functions, Pacific Rim has two main objectives in Del Toro’s mind, “It is my duty to commit to film the finest fucking monsters ever committed to screen and it is my duty to create the greatest fucking robots ever committed to screen.”

*Del Toro loves testicular metaphors. He has used them extensively every time I have seen him speak live. He also curses like a sailor.

Click here for all our Comic-Con 2011 coverage.