The New Teen Titans Annual #1

"Final Conflict!"  This is it, the final showdown in the ultimate sibling rivalry. Starfire and Blackfire will duel to the death and the fate of the galaxy rests on the outcome. Meanwhile, the Titans and the Omega Men try desperately to prevent the evil alien Gordanians and Branx warriors from unleashing the mad goddess X'Hal.  Written by Marv Wolfman and George Perez. Art by George Perez and Romeo Tanghal.