Raychul Moore of San Francisco during Comic-Con 2011 on July 23, 2011 in San Diego, California.

General view of the atmosphere during Comic-Con 2009 held at San Diego Convention Center on July 24, 2009 in San Diego, California.

General view of the atmosphere during Comic-Con 2009 held at San Diego Convention Center on July 24, 2009 in San Diego, California.

General view of the atmosphere during Comic-Con 2009 held at San Diego Convention Center on July 24, 2009 in San Diego, California.

General view of the atmosphere during Comic-Con 2009 held at San Diego Convention Center on July 24, 2009 in San Diego, California.

General view of the atmosphere during Comic-Con 2009 held at San Diego Convention Center on July 24, 2009 in San Diego, California.

Guest attends Day 1 of Comic-Con 2011 on July 21, 2011 in San Diego, California.

Cassandra Poulin of Los Angeles attend Day 1 of Comic-Con 2011 on July 21, 2011 in San Diego, California.

Guests attend Day 2 of Comic-Con 2011 on July 22, 2011 in San Diego, California.

Erica Hawking of San Diego poses during Comic-Con 2011 on July 23, 2011 in San Diego, California.

A general view of atmosphere as San Diego prepares for 2012 Comic-Con at the San Diego Convention Center on July 11, 2012 in San Diego, California.

Fans attend Comic-Con International 2012 at San Diego Convention Center on July 13, 2012 in San Diego, California.

Fans attend Comic-Con International 2012 at San Diego Convention Center on July 13, 2012 in San Diego, California.