Warner Bros. may be teasing a much larger threat looming in Batman v Superman (any guesses from the latest batch of photos?), but it was still a shocker to see the studio make the Doomsday reveal in the last big trailer release. Now that the cat is out of the bag, why is this the right movie to introduce the Superman villain to the cinematic universe?

Speaking with Empire, director Zack Snyder teased why he chose to include Doomsday in Batman v Superman, when it’s already packed with Lex Luthor (Jesse Eisenberg), Wonder Woman (Gal Gadot), and the DC face-off of the century.

As quoted by Comic Book Movie from the magazine’s latest issue, he said,

To go up against heroes like Batman and Superman, we wanted to introduce one of the DC Universe’s most iconic and powerful villains. He is essentially an unstoppable force. He poses a real threat to the world within the film.

Yes, that’s incredibly vague. But perhaps his comments on Luthor’s goals in the film will shed more light. Seemingly revealing another plot point to come, Snyder said:

You learn pretty early on that Lex is interested in metahuman existence and that there might be some relationship between that investigation and the appearance of Diana Prince.

We know that Bruce Wayne (Ben Affleck) knows about Diana’s Amazonian roots, but does this mean Luthor knows as well? The trailer that debuted Doomsday also teased that the creature is actually the transmogrified remains of General Zod’s corpse, courtesy of Luthor’s experimentation. Now we know this won’t be the first time he’s researched these beings, but for now it’ll be something fun to think about as we get closer to the film’s release on March 25th.

And don’t think we didn’t notice that “metahuman” mention. Kevin Smith, who co-hosted the recent DC Films special on The CW, said they dropped a whole conversation about the multiverse. Perhaps metahuman is just a term Snyder picked up from hanging out with the WB crew for so long, but could it be another piece of evidence linking the world of Arrow and The Flash, which describe super-powered beings as metahumans, to the DC films? Again, it’s something fun to think about while we discover more intel.