Armageddon 2001
This is a 15 issue crossover series. The reading order can be found here. It was followed by two mini series, Armageddon the Alien Agenda (which I do not have), and Armageddon Inferno (shown below).
Batman Annual, issue 15, 1991
Armageddon Inferno
A four issue mini series
Armageddon Inferno, issue 1, April 1992, and issue 2, May, 1992
Armageddon Inferno, issue 3, June 1992, and issue 4, July 1992
