text: Inter-company crossovers The Justice League has on a few occasions appeared in crossover stories with superhero characters from rival publishers such as Marvel Comics and Dark Horse Comics. In general, such inter-company crossovers are rare because a lot of resources must be spent in sorting out the legal issues and corporate politics of the two companies, and due to licensing issues, they cannot create spin-off merchandise and media, which all reduce the profitability of such projects.
  The last crossover between DC Comics and Marvel Comics was JLA/Avengers, which they jointly published in 2003. Now that Marvel Comics and DC Comics are part of major multimedia corporations (Disney and Warner Brothers, respectively), those aforementioned hurdles are even more complicated, which makes another project like JLA/Avengers much less likely. In 2017, Dan Didio remarked that DC Comics and Marvel are very competitive toward each other and only did crossovers when their sales were low. However, DC Comics did go on to feature the Justice League in crossovers with smaller companies such as Dark Horse Comics, such as a crossover with Black Hammer in 2019.
  Fictional history
  Members
  The members of the Justice League are heroes who normally operate independently but who occasionally team up to tackle especially formidable villains. This is in contrast to teams such as the X-Men or the Fantastic Four, who normally operate as a team and for whom the team is central to their identity.