The devs announced a new terminal was coming in the anniversary event next month. Like probably many others, I assumed it would be Crossbones Bazaar Chase since it seems like a quick and dirty port. However with @Asros mentioning that Crossbones would be sticking around in the Patrol zones, now I'm not so sure.
The Airport Battle feels unlikely due to it being a centerpiece for the Civil War event and it's very small. Additionally, I don't see the Arc Reactor/Silver Stat being added to boss loot tables.
Maybe the Mole Man map in Chapter 4 as aside from the Skrull bosses, he's the only boss with a boss artifact/reward achievement that doesn't show up in a terminal? General Kl'rt? Brand new One-Shot?