It's learned that Superman's dying screams woke up the Mother Boxes on Earth, reveals Zack Snyder in the Batman vs. Superman live-stream watch party.

"And then if you really want to wake up a Mother Box," Snyder says. "You do it like this... We have this 'Excalibur' moment where they come together... This moment right here. You hear the scream echo. That shot right there of Superman, screams as well, right. That sound goes out into the world, echoes across the globe, and if there were sleeping Mother Boxes on Earth, that sound would wake them up."

Zack Snyder talking about Superman's death:

“No protectors here. No Lanterns. No Kryptonian. This world will fall like all the others.”



Zack Snyder reveals that Superman’s dying scream is what awakens the Mother Boxes, thus sending the signal to Steppenwolf & Darkseid... #ReleaseTheSnyderCut

pic.twitter.com/9Si14RXI2d — DR Movie News -- (@DRMovieNews1) March 29, 2020

Below you can watch the footage of Superman's death in Batman vs. Superman where I believe Zack is referring to the footage at the 1:22 mark:

Snyder Cut features more from the Mother Boxes, Steppenwolf, Darkseid

What Zack Snyder has to say about Superman waking up the Mother Boxes is pretty interesting, as waking up the Mother Boxes, I believe, is a reason why Darkseid sets his sights on Earth.

It's also something that wasn't touched upon in Batman vs. Superman, but obviously would be in Zack's "Snyder Cut" of Justice League.

We can also probably add that waking up the Mother Boxes on Earth would alert those who have been protecting them, including the Amazons and the Atlanteans.

It has also been said that Lex contacted Steppenwolf, which is another way that Darkseid would target Earth.

Check out a recap below of the ending to Batman vs. Superman where Zack Snyder talks Superman, Doomsday, Lex Luthor, Darkseid and more.

Zack also talked about the death of Jimmy Olsen, his five-arc movie plan, Martian Manhunter, and teased the Snyder Cut.

Zack Snyder Batman vs. Superman live-stream end recap: