Although she has traditionally paired with either Steve Trevor or no one as a main romantic lead, and Superman with either Lois Lane or Lana Lang, there has often been the hint of a romance between the two characters. This began in the 1960 in the series Superman's Girlfriend, Lois Lane which was equal parts romance and action themed. In order to drive along the romance, the theme often came up of Lois Lane believing that Superman really loved Wonder Woman (though this was mostly for the purposes of a case.) In later years the same ideas perpetuated though most in imaginary stories or alternate tellings of the future. Following Crisis on Infinite Earths the characters were briefly linked romantically in Action Comics #600 which was written by John Byrne. Subsequently the characters' interest in one another was generally portrayed as a strong friendship (this occurred under different writers, primarily Messner-Loebs and Rucka.) Following the reboot of the DC universe into the new 52 the characters once again showed a romantic interest in one another. They found common ground in the isolation which their power give them and shared a kiss in Justice League #12 in 2012. It was later on revealed by Geoff Johns that their relationship wouldn't last for long and will end badly.
Gaines didn’t know any of this when he met Marston in 1940 or else he would never have hired him: He was looking to avoid controversy, not to court it. Marston and Wonder Woman were pivotal to the creation of what became DC Comics. (DC was short for Detective Comics, the comic book in which Batman debuted.) In 1940, Gaines decided to counter his critics by forming an editorial advisory board and appointing Marston to serve on it, and DC decided to stamp comic books in which Superman and Batman appeared with a logo, an assurance of quality, reading, “A DC Publication.” And, since “the comics’ worst offense was their blood-curdling masculinity,” Marston said, the best way to fend off critics would be to create a female superhero.
Wonder Woman and the other heroes were finally released from the Firestorm Matrix when Batman used the Lasso of Truth on Firestorm. Superman was still infected with the Kryptonite shard inside his nervous system, but Lex Luthor was able to extract it, saving Superman's life. Luthor also assembled a group of villains that defeated the Crime Syndicate. Later, at the Batcave, Wonder Woman and the Justice League talked about the enemy that destroyed the Crime Syndicate's world and came to the conclusion that Darkseid would return.