"Millennium's End, Part 1: Earth Changes"
Triangle 1998-15. Continued from Action Comics (1938) #743 and continues in Aquaman (1994) #43 (15.1), Challengers of the Unknown (1997) #15 (15.2) and in Superman (1987) #134 (16).
Cover (center) connects with Aquaman (1994) #43 (left) and Challengers of the Unknown (1997) #15 (right) to form the top row of a larger puzzle image from all nine Millennium Giant issues.