Justice League Trailer: 10 Big Questions We're Left With

4. Steppenwolf?

It's pretty widely known by this stage that Steppenwolf is going to be the main villain of Justice League, with Game of Thrones' Ciaran Hinds the man stepping into the role. Despite this, however, we've still not had a look at him in action, but this trailer does at least give us something to go on.

During an underwater scene, so presumably Atlantis, we see Aquaman quickly dodging a glowing axe thrown in his direction. Adding two and two together, then, it seems a safe bet that this is the Electro-axe, the weapon-of-choice of Steppenwolf. Is that what we're seeing here, and does that mean he directly attacks Atlantis himself?

That itself opens up the question of where else we might see Steppenwolf, since for most of the trailer it seems the Parademons are doing the bulk of the work. Is he going to turn up elsewhere looking for the Mother Boxes? There's also the matter of when this takes place, as based on the appearance of Aquaman it looks like it could be earlier in the film, perhaps before he joins the rest of the heroes.