Spoiler video previews images from covers of manga volumes

NOTE: The below video shows images from the volume covers of Hajime Isayama's original Attack on Titan manga series, and contains spoilers for the manga.

Funimation began streaming a 15-second preview video on Saturday for the third season of the Attack on Titan anime.

The final episode of the anime's second season revealed on Saturday that a third season will premiere in 2018.

The second season premiered in Japan on 21 networks, including Tokyo MX and MBS, on April 1. Funimation began streaming a simulcast version on the same day, and Crunchyroll is also streaming the series. Funimation announced in December that it licensed the second anime season.

The English dub of the second season premiered on Adult Swim's Toonami in April, and then on Funimation's streaming service a day later.