Comic-Con 2010 in San Diego, California

Comic Con: Comic Book And Animation Fans Flock To Comic-Con

Lee Kim speaks to customers about his custom-made masks Photograph: Sandy Huffaker/Getty Images

Fans look over toys on display at the festival Photograph: Sandy Huffaker/Getty Images

Erica Padilla has her photo taken in a Star Wars booth Photograph: Sandy Huffaker/Getty Images

Kevin Fontana has his picture taken at The Blood Factory booth in Comic-Con International Photograph: Sandy Huffaker/Getty Images

Comic-Con: A woman dressed as a zombie at Comic-Con

A woman dressed as a zombie to promote the AMC television show The Walking Dead, outside the convention centre Photograph: Gregory Bull/AP

Comic-Con: Rowan Weir in her original costume during Comic-Con

Rowan Weir in her original costume Photograph: Sandy Huffaker/Getty Images

Comic-Con: Steven Seiferer in a Captain America costume at Comin-Con

Steven Seiferer in a Captain America costume Photograph: Sandy Huffaker/Getty Images

Comic-Con: Attendees dressed as characters from the movie,

Panky Sui with attendees dressed as characters from the movie Ghostbusters Photograph: Gregory Bull/AP

Comic-Con: Comic-Con attendees dressed in armour wait for a mock battle

Comic-Con attendees dressed in armour wait for a mock battle Photograph: Denis Poroy/AP

Comic-Con: Attendees take pictures at comic-con

(Left-right) Roxanna Meta talks with Psy Kitten Pow, and Albert Ng takes a picture of Mia Ballistic Photograph: Gregory Bull/AP

Comic-Con: Fans peruse the aisles during Comic-Con International

Fans peruse the aisles at the convention Photograph: Sandy Huffaker/Getty Images

(Left-right) Actors Michael Sheen, Olivia Wilde, Garrett Hedlund, Jeff Bridges and Bruce Boxleitner pose at the Tron: Legacy panel Photograph: Kevin Winter/Getty Images

Comic-Con: Comic-Con attendees in 3D glasses at the

Comic-Con attendees in 3D glasses at the Megamind panel Photograph: John Shearer/Getty Images for Paramount

Comic-Con: Will Ferrell, Tina Fey and Seth Rogen at 'Megamind' panel Comic Con

Will Ferrell, Tina Fey and Jonah Hill on the Megamind panel, with a cardboard cutout of Brad Pitt Photograph: Kristian Dowling/EMPICS Entertainment

Comic-Con: Freelance illustrator Tommy Castillo shows off some of his work Comic-Con

Freelance illustrator Tommy Castillo, from Florida, shows off some of his work Photograph: David Maung/EPA

Comic-Con: Convention attendees try soon to be released video games Comic Con

Convention attendees stay glued to monitors as they try soon-to-be-released video games Photograph: David Maung/EPA

Comic-Con 2: Comic-Con attendee Chase Matthies, dressed as a character from

Chase Matthies dressed as a character from Halo Photograph: Denis Poroy/AP

Comic-Con: A set of teddy bear zombies Comic Con International 2010

A set of teddy bear zombies Photograph: David Maung/EPA

Comic-Con: A family as characters from Tim Burton's

A family dressed as characters from Tim Burton's Alice in Wonderland Photograph: Denis Poroy/AP

Attendees dressed as "Chef Vader" and a storm trooper from Star Wars Photograph: Mike Blake/Reuters

Comic-Con 2: Men in costume walk outside of the San Diego Convention Centre

Two men in costume outside the San Diego convention centre Photograph: Dan Steinberg/AP