Dave discovers a strange, pulsating seed packet in his basement—. It doesn't sprout a plant; instead, it opens a small, swirling rift. From it tumbles a battered, future version of Gatling Pea (now with laser-scarred armor and a single, glowing red optic). Its final words before shutting down: “The Nexus… at the lawn’s end… Zomboss is… undone.”

(takes a long, slow bite of a taco) “The harvest, Patrice. The harvest of understanding.”

Patrice returns from university. She stares at Zomboss, now wearing an apron and grilling tofu dogs.

Simultaneously, across Suburbia, zombies begin acting strangely. Instead of mindless shambling, they form disciplined squads. Conehead zombies wield stop signs as shields. Buckethead zombies use their buckets as battering rams. Leading them is a new elite zombie: (a zombie in a cracked, sparking lab coat, holding a broken stopwatch). Where it walks, grass withers into gray dust, and plants age rapidly (a new mechanic: Chrono-Zombies inflict "Decay," which reduces a plant’s attack speed and health over time).