Justice League International #18 – “Where No League Has Gone Before” – Keith Giffen, J.M. DeMatteis/Kevin Maguire/Al Gordon
This one starts with the spaceship carrying J’onn J’onzz, Big Barda, Gnort, and Rocket Red suddenly appearing in the far reaches of space thanks to Barda hooking her Mega-Rod into the ship’s warp system. They’re looking for Manga Khan, who took Barda’s husband (Mr. Miracle) while trying to add Earth to his cosmic barter network. Khan’s Cluster isn’t there, so J’onn starts calculating a new destination. Gnort warns him to stop, since his ring can detect something coming in fast … the Cluster. Yes, thanks to the vagaries of warp travel, the Leaguers
actually beat Manga Khan to his destination. He’s pissed off that they managed to find him, so he decides to call in some help … the interstellar assassin known as Lobo. I think Lobo was originally supposed to be a parody of over-the-top characters like Wolverine and Punisher, but he ended up being hugely popular because people in the 80s had trouble understanding satire. Anyway, Lobo comes crashing into the ship, ready to waste everybody. Barda’s the only one who’s familiar with Lobo (although Gnort mentions that “Lobo” translates from a Khundian dialect as “He who devours your 
entrails and thoroughly enjoys it”) so she tries to get the Mega-Rod out of the warp drive so she can use it against him. While Lobo chooses who to kill first, Manga Khan warps away. The Leaguers are in over their heads with Lobo, but manage to stall him long enough for Barda to get the Mega-Rod and blast him with it. She doesn’t kill him, just sends him somewhere far away so they can get back on Khan’s trail. Back on Earth at the Embassy, Blue Beetle, Booster Gold, Green Flame, Ice Maiden, Guy Gardner, and Oberon are discussing a membership drive to augment the League’s ranks. They’re interrupted when someone comes smashing through the wall, knocking Guy down on the way. I think I know where Barda sent Lobo but believe it or not, that’s not the worst of their problems: the impact to Guy’s head has turned him back into an asshole.
Young All-Stars #17 – “Neptune” – Roy and Dann Thomas/Michael Bair/Tony DeZuniga
This continues from last issue, with the Dzyan named Kalla trying to convince Neptune Perkins that his grandfather (Arthur Gordon Pym or Captain Nemo, whichever identity you prefer) needs his help to escape some Nazis and keep them from mastering the esoteric power source known as Vril. Kalla tells Neptune how he was born and his parents knew he was different because of his webbed hands and feet … plus he couldn’t live long outside of salt water. He grew up near the water, his parents letting various scientists study him but not informing him that
his powers (which included holding his breath longer than any other human and limited telepathic contact with dolphins) were the result of them boning near a Vril generator. Neptune takes over the story when it comes to his parents’ deaths, recounting how they’d asked him to leave for a while so they could discuss something and when he returned, he found them shot to death. He fucked around for a while until he met the All-Stars (in All-Star Squadron 33) and ended up joining. Kalla tells Neptune his parents were killed by Nazi occultists led by Colonel Streicher, coincidentally the same guy who’s 
captured Neptune’s grandfather to get his riches and the secret of the Vril. If Streicher can master Vril power, he can command the Dzyan and the Nazis will be unstoppable. The others want to wait for backup, but Neptune wants vengeance for his parents’ deaths, so he and Kalla take off. Kalla changes to a whale so she can give Neptune a fast ride to the Arctic, where Pym’s artificial island (Leviathan) has been commandeered by Streicher and his men. The other All-Stars decide to follow Neptune and Calla in the Airacuda, their new plane (which they really aren’t supposed to be using, but Wildcat says it’s okay and he’s a rule-breaker from way back). In the Arctic, Neptune and Kalla bust into Leviathan and find Pym (or Argor, as the Dzyan call him) bathed in a ray
that keeps him from accessing his Vril powers. That lack of access has aged Pym, but Kalla says she knows the cure for that … Neptune’s blood. She knocks Neptune out and Argor realizes she made a deal with the Nazis, agreeing to bring Neptune if Doctor Thule would use his scientific knowledge—and Neptune’s blood—to save Argor’s life (since he’d apparently started aging even before the Nazis showed up). But as every human knows, you can’t trust the Nazis, so Streicher shoots Kalla and boasts about how the Nazis will soon rule the world.