A dark fantasy poster features movie Sonic with a sword and gun, alongside a man with a suit and swords, under a stormy sky with a monster and glowing text 'HOLLOW DASH'.

Sonic stands front and center, his dark blue fur shadowed and his eyes heavy with bags, expression cold and unyielding. In one hand he grips a glowing sword, in the other a futuristic gun humming with faint blue energy. Beside him, Kael Voss stands slightly behind, his fluffy black hair messy, eyes tired and dark, dressed in a sharp dark suit with two swords strapped to his back. The ruined Green Hill Zone stretches behind them—cracked ground, dead grass, and broken loops beneath a stormy sky streaked with faint lightning. Looming in the distance is a swirling, creeping mass of black goo—the ominous final villain—casting a shadow over the scene. The title HOLLOW DASH cuts across the bottom in sharp, glowing blue letters that flicker with electric energy. See more