The HBO DCU series Lanterns is halfway done, and the sixth episode is releasing this week. HBO released the midseason trailer on Thursday, and it is focused on the biggest mystery that was set up all the way back in the closing minutes of the first episode: Hal Jordan's mysterious murder in 2026. But since then, the DC series has not returned to the 2026 timeline.Instead, episodes 2, 3, 4, and 5 were set entirely in 2016, with the fifth one finally wrapping up the flashback portion. The upcoming sixth episode, "Bad Optics", will return to 2026. If the midseason trailer is to be believed, Hal was held responsible for the destruction of Rushville. We see Hal released from prison in the Lanterns midseason trailer. But as per The Direct, fans have spotted the biggest clue in the trailer is at the 01:22 mark.This tiny detail from Lanterns Episode 5 resolves Hal Jordan's murder mystery:Aaron Pierre in Lanterns Episode 5 | Image Via: JioHotstar/www.hotstar.comJohn Stewart was burned inside his rental car in last week's episode, but Zoe rescues him before the fire claims his life. Moreover, the Manhunter places John inside a machine that regrows his skin. After it cures him, we see a small dot on John's right arm. According to The Direct, many fans believe that the dot on John's arm was made by the mysterious machine.They also think that the machine can even create clones, apart from curing the occupant inside. At the 01:22 mark of the midseason trailer, we see the same dot on Hal Jordan's right arm, as he is lying on the floor of a room. As he is lying on the floor, we see an unidentified character walking up to Hal Jordan.This small moment from the midseason trailer has led some to theorize that even if Zoe is dead, Kerry Kane and Billy Macon's son, Noah, is part Manhunter. The young boy might be responsible for planning an elaborate scheme to avenge his grandmother's death. As that happens, other residents of Rushville decide to join Noah in avenging the town's destruction.What is this Lanterns fan theory? View this post on Instagram Instagram PostThe theory suggests that the murderer or murderers might have created a Hal Jordan clone, killed that duplicate, and placed the remains on the stadium. Meanwhile, John Stewart is summoned to Rushville to investigate "Hal Jordan's" death. This entire plot could be the town's elaborate scheme to avenge the Manhunter, who was their benefactor.The upcoming episode of Lanterns, which kicks off the 2026 plotline of the HBO series, will make things clear, as we will finally learn who killed Hal in one of the remaining three episodes. But one thing we know about the upcoming sixth episode is that Nathan Fillion will return as Guy Gardner in it.Last week's episode revealed why Guy was the only Green Lantern in last year's Superman, which was set in 2025. John decides to walk away from the opportunity to join the Green Lantern Corps even though he met the qualifications and had taken the ring away from Hal Jordan.But one thing is clear: John would finally take up the mantle of Green Lantern by the end of the HBO series, setting up his role in the Superman follow-up, Man of Tomorrow.Lanterns Episode 6 will air tonight on HBO.