Legendary comic book creator George Pérez was due to appear at the East Coast Comic Con this weekend (and is still planned for Crash Comics in Florida for Free Comic Book Day next weekend, despite their ordinance issues), but is not appearing at today due to medical issues. It was reported to Bleeding Cool organizer Cliff Galbraith told attendees that Perez is in the hospital with a "heart problem."
Other voices of creators have echoed this.
Friends and family have posted their well wishes. We join them wishing George a speedy recovery and good health.