Hawkgirl was one of the three heroes called by Martian Manhunter to help fight off the Imperium Invasion she teamed up with Superman and eventually got captured but was saved by Batman she later joined the Justice League throughout the series she develops a relationship with Green Lantern during the three part series finale it is revealed that Hawkgirl was actually sent to Earth to as a spy and joined the Thanagarian invasion after the League pu down the invasion Hawkgirl was kicked out of the league and Superman began recruiting heroes from all over Hawkgirl later returned to stop Solomon Grundy's rampage and rejoined the league