Brainiac (DC Extended Universe)

Brainiac, sometimes also known as Milton Fine or as the Brain InterActive Construct to Kryptonians, is a robotic/computerized supervillain, who is one of Superman's main nemeses aside from Lex Luthor. His most well-known crime was the shrinking of the city of Kandor prior to Krypton's destruction, and preserving it amongst a host of other cities from various planets aboard his spaceship. His original name was Vril Dox.

Brainiac is usually depicted as a green humanoid, coming from the planet of Colu where all native inhabitants have green skin. In his original appearance, Brainiac was in fact a Coluan man; however, his origin and nature were soon retconned and changed, making him an android hailing from Colu. His origin is frequently reimagined for various Superman stories; but they almost always begin on the planet Colu. Many recent versions of his story, however, have given him an origin on Krypton. He replaces Darkseid as the Main antagonist of the DC Extended Universe.

It is revealed that Brainiac has been around all along and secretly planned the destruction of krypton. Once Darkseid was defeated he got signals from earth which helped him locate the planet and plan and invasion. Since most of the Justice Leauge thinks that danger is over, they are completely suprised and caught off guard by Brainiac's invasion of earth, he is able to capture the planet but several members of the Justice Leauge (Flash, Batman, Superman,Wonder Woman) Were able to make a quick escape, although earth did show resistance, they were quickly neutralized and the UN officially announced a surrender mere hours later. Later he was able shrunk the planet.

In the sequel, the reminaings of the Justice Leauge make the plan to save earth and defeat Braniac. They are able to get Green Lantern's help, and they try to execute their plan, however Brainiac outsmarts them and they are forced to retreat. Eventually the Justice Leauge is forced to form a temporary alliance with Sinestro, as he and Green lantern provide a distraction for Brainiac, they are able to fight,however they aren't able to kill him as he regenerates whitin nanoseconds, however most of his army is destroyed and he is forced to retreat for a while. He is then revealed to be communicating with Lex Luthor in the post credits scene of Man of Steel 2. He will also be shown in the post credit scene of The Flash, building the anti monitor.

Powers
Technokinesis

Vast psionic abilities

Superhuman intelligence

Superhuman strength

Superhuman speed

Superhuman durability

Healing factor

Trivia
After Darkseid's defeat he takes his place as the main DCEU Antagonist.