La Última Sonrisa [The Last Smile]

In a city shrouded in shadows, the Joker conspires with the sinister Dr. Jocoso to unleash “The Genocidine,” a virus capable of triggering lethal laughter that signals the fate of anyone it infects. Beneath an abandoned train station, the duo perfects the formula and trusts its spread to an army of rats: slick-backed swarms with glowing eyes that slither through the sewers like heralds of plague. A single brush of a whiskey is enough for the scourge to burst forth and deadly laughter to devour the city. But Batman is already on the prowl. A swarm of bats equipped with micro-cameras has pinpointed the laboratory. The Dark Knight gathers trusted heroes for a lightning strike—descend into the depths, smother the carrier rats, and obliterate every drop of the virus before the first fatal guffaw reverberates through the streets. The shadows lengthen and the countdown quickens; In the imminent final clash, it will be decided whether the city erupts in fatal laughter or awakens to a new dawn.