Blackguard opened a bar with what was once a green lantern
As you could probably have guessed, the attack on Warrior’s didn’t go in the bad guys’ favor and even resulted in Guy Gardner (in an altered psychological state) burning Blackguard. However, he survived and after Richard Hertz spent several years in prison, he was released from prison as a changed man, who is now friends with the former Green Lantern. He and Gardner then decided to open a bar together in Queens called the Dark Side.
Unfortunately, by this time Neron’s intellectual gifts to Hertz waned. This would lead him to return to a life of crime, but of course to no avail. After years behind bars, Blackguard was given one more chance to prove his worth as a supervillain, but it would also be his last.