When Seg is searching for the Sentry, a black market dealer mentions having recently acquired a Daxamite dagger. In the comics, Daxamites are a race of humanoids that descended from a group of Kryptonians who left their home planet to explore the universe, and who colonized Krypton's nearby sister planet Daxam. And though not directly related to Krypton (2018) in and of itself, Daxamites appear in the second season of Supergirl (2015); the title character is Seg's granddaughter, and Superman's cousin, Kara Zor-El.