While the book was billed as leading up to the beginning of DC's "Final Crisis" limited series, it later emerged that the plotlines in "Countdown" had diverged from what was written for "Final Crisis", leading to continuity problems between the two books, as noted by "Final Crisis" author Grant Morrison. Much of the comic has subsequently been retconned out of continuity, along with "Death of the New Gods." Jimmy Olsen learning Superman's secret identity, the battle between him and Darkseid, and other such events have been ignored following the conclusion of the series. During a "DC Nation" panel at the 2008 San Diego Comic Con, DC Editor-in-Chief Dan DiDio invited fans to give their own opinions on "what went wrong" with "Countdown". DiDio had reportedly described the series (prior to its release) as ""52" done right."