Who Kissed? Who Quit? BATMAN #40 and JUSTICE LEAGUE #38 - SPOILERS
#Ultimately, Wonder Woman used Martian Manhunter's Martian Transconsciousness Articulator, a doohickey that plays out various possible futures in dream-like fashion for the user, in order to determine that maybe she and Batman were better off just being friends and teammates. People also tend to fall in love with Batman and wonder woman kissing of the same background.