The film's first look was revealed on July 19, 2023. "Kalki 2898 AD" made history as the first Indian film to be presented at San Diego Comic-Con's Hall H on July 20, 2023

 where the official title and a sneak peek were unveiled, prior to this, a limited comic-strip panel depicting a pivotal scene between "The Raiders" (followers of Kali) and Bhairava was released.

On Maha Shivaratri, the filmmakers released a poster introducing Prabhas's character, Bhairava. On April 21, 2024

A new teaser was released, introducing the character Ashwatthama played by Amitabh Bachchan. The character is inspired by the immortal character from the ancient Indian epic Mahabharata.