Terror Incognita In a new collection reprinting JLA #55-60 and featuring the Worlds Greatest Heroes we discover that some of the JLAs deadliest foes -- the White Martians -- have returned with a plan to systematically destroy each one of our heroes and disable the Earths ability to create their one weakness: fire! Plus THE JOKER: LAST LAUGH crossover issue that featured a Jokerized version of Doctor Polaris wreaking havoc on Earths magnetic poles and a classic Christmas tale titled Twas the Fight Before Christmas.