Thanks to the success of AMC's The Walking Dead (not to mention the fact that last month's The Walking Dead #100 became one of the highest-selling comic books ever) it would be easy to forget Robert Kirkman's other ongoing series, Invincible. Well, next January's landmark issue #100 of the title - which has been pencilled by Cory Walker and Ryan Ottley since it debuted in 2003 - looks set to be one to watch out for as Image seemingly teases the death of a major character. With his powers playing up and someone else currently holding the 'Invincible' mantle, could this be the end of Mark Grayson?!