Complex sentence: Fel Andar was created after DC Comics rebooted the Hawkman character after publication of the 1989 "Hawkworld" mini-series, as a stand-in for Katar Hol in Katar's post-Crisis, pre-Hawkworld adventures, including his brief membership with Justice League International.
Split into simpler sentences: Fel Andar was created after DC Comics rebooted the Hawkman character after publication of the 1989 "Hawkworld" mini-series. He was designed as a stand-in for Katar Hol in Katar's post-Crisis, pre-Hawkworld adventures, including his brief membership with the Justice League International.