Warning! Spoilers ahead for DC vs Vampires #6
In the latest issue of DC vs Vampires, Green Lantern severely underestimates a surprising hero, revealing a vulnerability about Hal Jordan that he brutally pays for. Having been bitten and turned into vampires, Green Lantern and Wonder Woman were hunting Green Arrow, Batman, and the Dark Knight's family of vigilantes. What followed was a major blood bath on both sides, one where Green Lantern ultimately didn't come out on top.
Previously in DC vs Vampires, Mary Queen of Blood was murdered, a vampire leader who had been influencing the uneasy peace between vampirekind and humans. Having been replaced with the mysterious Vampire King, a revolution began where an army of vampires began biting and corrupting supervillains. The vampires then turned their attention to the heroes who would threaten them most, such as those with light-based powers like Hal Jordan's Green Lantern. One of the first to be bitten, Jordan began to slowly corrupt the Justice League, turning Wonder Woman into a vampire while killing Barry Allen whose high metabolism would've made the Flash the deadliest vampire of all time, draining the world of blood while the rest of the vampires starved. Now, Batman, Green Arrow, and their families are some of the few heroes still standing, though the Dark Knight had to blow up his Batcave so they could all escape when confronted by the League.
Now, DC vs Vampires #6 from James Tynion IV, Matthew Rosenberg, and Otto Schmidt sees the Bat-Family (and Green Arrow) confronted by the vampires who were once their friends in a nearby safe house. Capturing them all with a construct from his ring, Green Lantern was curious to know what Batman's plan was beyond using sun lamps to slow him and Diana down. However, there was one hero Jordan neglected to capture due to his own assumptions (which Batman was counting on).
Knowing that Alfred would likely escape Jordan's notice, set power structure with the Green Lantern Corps. As such, it's not that surprising that Hal didn't see Alfred Pennyworth as a threat, viewing him more as a civilian than a member of the Bat-Family who's just as willing to fight for those he loves.
Following the loss of his arm thanks to Alfred, Green Lantern was ultimately defeated by Green Arrow who tragically delivered the killing blow to his former best friend-turned-vampire. While a major betrayal and Wonder Woman's survival resulted in only a few heroes making it out of the safehouse alive, Alfred taking down Green Lantern is still quite the impressive feat even though it's happening in an alternate universe. That being said, the vampire revolution is still underway. While the loss of Green Lantern was quite the significant blow, the high cost it took to make it happen might not have been worth it in the latest issue of DC vs Vampires.