In DC comics, Mother Boxes are created by Apokoliptian scientist Himon using the fairly unexplained and mysterious Element X. They’re typically found on New-Genesis, home of the New Gods, and even these highly powerful beings were not able to truly understand their nature and origins. Mother boxes are senient, portable computers that possesses impressive powers, including teleportation (by manifesting boom tubes) and energy manipulation. There is also such thing as a Father Box, an Apokoliptan version of a Mother Box which could well materialize as Warner Bros. ‘ DC Extended Universe’continues to expand, but for now, the focus is solely on the former piece of technology.
Mother Boxes are a huge deal in DC Extended Universe. In fact they’re the driving force of the Justice League, ultimately giving the Batman and Wonder Woman the need to recruit other Justice Members – and it’s partly how and why Justice League was able to resurrect Superman. One of the three Mother Boxes currently on Earth was shown briefly in Batman vs Superman : Dawn of Justice, but despite being limited to a camp role there, their importance to the DCEU can’t be overstated. The whole reason Justice League unities to stop the Steppenwolf, the self – proclaimed “End of worlds”. The Villanious extraterrestrial being invades Earth multiple times in the movie to gather Mother Boxes.
Batman on his investigations of Parademons and his numerous travels to recruit other members he continues to notice the same symbols: Three Boxes. It takes a long talk with Wonder Woman, for him to finally find answers. Several years ago Steppenwolf attacked Earth, armed with three Mother Boxes, with plans to take over the world and completely renovate it.
So the question is where are Mother Boxes located ? Well it’s kind of an epic story. When Steppenwolf attacked Earth many years ago, the forces of Atlanteans, Amazonians ,other beings such as Zeus and Green Lanterns and humans united together to fight him and save the planet. Overpowering the invaders, they sent the aliens back to their own dimension. After the war ended it was decided that Three Boxes will be kept seperately so one of the Mother Boxes was being securely kept in Atlantis, another in Amazon and the Humans hid it underground.
When the Three Mother Boxes converge, they form what’s known as the Unity which is mentioned multiple times in the movie, but was never explained. What’s known is that the Unity is a force of power that Steppenwolf and the force of Apokolips use to invade and take over the planets. You can see how this is a problem when the antagonist arrives on Earth once more.
The Mother Box that was in possession of the humans is unearthed and eventually finds its way to S.T.A.R. Labs, where Silas Stone uses it to recover Victor Stone was badly injured in a severe accident and his life was at stake, a Mother Box is used to help breath life into his new technology infused body. The Mother Box leaves a lasting effect on Cyborg, allowing him to have somewhat of an understanding on what they are and what they’re capable of.
While its still not confirmed if New Gods other than Steppenwolf will eventually show up in the DC Extended Universe, it’s likely that we haven’t the end of Mother Boxes at least. There’s a chance that Darkseid may appear and decide to take the matter in his own hands and assemble the Mother Boxes himself.