Well, we have both Zack Snyder and Henry Cavill stating that there should be more before they dive into a Justice League movie.
Previously, Snyder said hypothetically he would like more from Superman before a Justice League movie, and now Henry Cavill offers a similar opinion, which sounds more like what Marvel Studios did with The Avengers by building up to it with their previous films.
Speaking with Jake Hamilton, Henry Cavill is asked how he would do the Justice League movie.
"If Warner Bros. were to come to me and say 'we are planning this and how do you want to do it,' you have to introduce various characters, so it's just not like 'bam' the world is full of god-like superheroes, you would have to find them and introduce them through various movies, and then bring them all together with a major threat that happens. Whether that threat be Doomsday or Braniac or whatever, we don't know, but it would have to be a lot more storyline to have the audience be okay with an introduction to say Brainiac or Doomsday."
See the video below for more.
Man of Steel opens June 14th in IMAX 3D directed by Zack Snyder and starring Henry Cavill as Clark Kent/Superman and Michael Shannon as Zod.
Head on over to the Cosmic Book News Man of Steel movie hub for more news, images and trailers.