According to Gamespot, the info comes from a tease in Ubisoft Germany's product listing for Valhalla. When translated, the DLC states its larger season's pass "Includes the story mission: The Legend of Beowulf. Discover the cruel truth behind the legend." Beowulf appropriately fits into the game's timeline as he fought giants and dragons during Eivor's conquest across Norway. Players are also expected to experience a different version of the folk tale and unlock unique abilities across the DLC.
It's not the first time Ubisoft has touched on mystical aspects in Assassin's Creed. Both Origins and Odyssey separated fact from fiction with DLC that took players to places such as Atlantis while getting an opportunity to fight creatures such as Medusa and Anubis. Players even gained their own supernatural abilities to help beat the super-bosses while exploring new territory apart from the main storyline. Assassin's Creed Valhalla is likely to keep the format, with Beowulf joining the Season's Pass and presents a few opportunities to connect with other games.
Narrative Director Darby McDevitt also told Gamespot players will get to find out what happens after beating Odyssey's Fate of Atlantis DLC. Through Valhalla, the present-day character Layla will also make an appearance through a connection with the Animus as their story continues.
Assassin's Creed Valhalla is set to release for current systems and the PS5 and Xbox Series X in Holiday 2020. You can see our preview of the game here.