Project 7734 (UE-43)

"It's a research and development lab, about a dozen prototypes for Kryptonite-based weapons, fragment grenades, bladed weapons, aerosol sprays, biochemical gas."

- Sam Lane

Project 7734 is a military project on the creation of Green Kryptonite weapons.

Foundation
In 2020, Sam Lane was attacked by "The Stranger" and was given his doppelgänger's keychain which writes 7734, also writes "Hell" when rotated. Later, Sam called Rosetti and started the project.

Backfire
"It was only meant as a last resort, just to weaken him temporarily."

- Sam Lane

Days later, Rosetti went rogue after undergoing the X-Kryptonite experiments by Morgan Edge. He utilized the weapons from the project and fought Superman. Superman struggled to fight Rosetti with the Synthetic Kryptonite Gas affecting his respiratory system. Luckily, he was rescued by John Henry Irons who used the Kryptonite Spear to impale Rosetti, killing him. However, Irons started turning to Superman and attempted to kill him with the spear, eventually talked down by Lois Lane. Afterwards, Superman questioned Sam Lane on the project with him regretting his choice.

When fighting a bank robbery in Mexico, Superman realized he struggled to breathe and he was knocked unconscious with regular bullets. He then fought back and treated his bruises, which surprised his family as he is supposedly invulnerable. Jordan soon asked for Clark's help as he started sneezing ice out of his nose and mouth. With Sam's team working on a cure, Clark brought Jordan to the Fortress of Solitude and burnt the Kryptonite out of Jordan's system.