So info on this leak sounds really legit, could be complete bs but who knows. Just some bullet points from the leak it wasn't really organized.
Ultimately Luthor uses Project Black Zero to create a "Black Zero" Superman (HINT HINT- Bizzaro N52 name and Zod's ship thingy was called Black Zero in MoS) that triggers something called the "Doomsday protocol" in Zod.
There's a creepy rubber Henry Cavill face they laser onto Zod.
Doomsday is something that lies within each Kryptonian (Except Superman, because he had a natural birth) to prevent cloning and revival. Sort of like a anti-piracy.
dikk and jason are named dropped, and Jenna Malone is Carrie Kelley seen for a small scene being attacked by the guy you see branded in the trailer after batman stops it.
Aquaman shows up twice. The Metal Men don't appear but they're alluded to.
The credits apparently want everyone to sit around and watch because it's the Justice League (Superman, Batman, and Wonder Woman) doing Justice League stuff, with a second appearance by Aquaman helping Wonder Woman with a flood, Batman working with Cyborg, and Superman and Flash sprinting through a city.
You don't see joker but hes referenced.
Wonder Woman talks about the New Gods.
Doomsday is stopped when forced into the Phantom Zone, opened by Batman, by Superman after a distraction from Wonder Woman.
Description of the flash suit seen in the credits scenes, It's kinda like a combination between a Swat Team uniform and a diver's suit. The helmet is a rubbery plastic with metal wing ears like Jay Garrick's. He doesn't wear lenses. There are different textures on the suit, but it all seems kinda rubbery or duct tape type material. It's thick. It's brighter red in the center and darker red on the legs and the seems. He has faded yellow boots and gloves. There is no lighting around around him or trailing.
The batman vs superman fight isn't long it ends with Batman "winning" followed by him having a heart attack, assumingly from being in a 2 ton suit and being thrown through streets and being in range of a kryptonian bomb that goes off in the fight. Superman flys him to the cave.
Doomsday does evolve to look more like the comic version, Wonder Woman chops off his arm and it grows back to look like the comic book one with the cool spike, and he starts to grow spikes out of his head when Superman is rushing his face against the pavement.
scoot mcnairy is William Magnus, who has a direct influence on the creation of Cyborg, but leaves when he finds out Luthor's a total douche.
The doomsday fight also takes place 6 months after bruces heart attack.
Wayne enterprises owns the World Engine, that could become the watch tower. No fortress of solitude mentioned. No hall of justice mentioned.
Lex gets cancer after working with so much alien shyt. He never wears a wig, and eventually shaves it.
Aquaman tells Wonder Woman he thinks the World Engine is from the New Gods, and Wonder Woman scouts out Clark and Bruce as Diana, then shows up talking about how "New Gods" yet unheard of have powers of mind and threats we can't imagine, etc. It's not super delved into but it's the main reason they let her into the club and decide to keep in contact.
Batman nightmare is a recurring one like that episode of Twilight Zone. The first one ends after the Parademons start picking up soldiers and a defeated Batman, the second one ends after Superman rips off Batman's mask and his eyes glow red.
Lex gets cancer after working with so much alien shyt. He never wears a wig, and eventually shaves it.
The dikk and jason name drop goes like this apparently "This type of brutish attitude is precisely why master dikk left you, and why master Jason-" Then Bruce cuts him off.
The cut he saw was a little over three hours. He's assuming they're editing it down to 2.5 but they're VFXing the whole thing for the "Definitive Cut"
WW has a accent but it fits.
Lex/OS uses "Kryptonian Software." possibly Brainiac?
Cyborg is Luthor's poster boy for victims of Black Zero
I just spoiled the movie for myself
Good thing is that it sounds dope 
