It's most likely the villain DLC from the season pass.
Some content developers have spotted a secret in-game teaser that appears to be promising something involving armoured tigers and potentially other references to Far Cry series villains before of the game's official premiere.
Players may uncover QR codes on the sides of a specific pair of crates in Far Cry 6, scan them with the in-game phone camera, and view a very small video teasing future content, as demonstrated by YouTuber RaptorRollGameplay.
A cartoon revolver cylinder waves hello and says something mostly inaudible about animals in the trailer. The trailer then cuts to a red and blue-hued digital map with miniature models of what appear to be temples from Far Cry 4's Kyrat. Then a picture of a tiger wearing armour attacks a man appears on the screen. The text "sky temple" flashes briefly in the top right corner, which could be a reference to Far Cry 4's Valley of the Yetis DLC, where one place was dubbed the Sky Shrine. Finally, the map reappears, with a few skull symbols strewn throughout.
While some Far Cry fans believe the QR codes are linked to the Far Cry 6 villain DLC, which Ubisoft promised in the season pass video, I believe the safer bet is that they are linked to the Far Cry 6 villain DLC. You take on the role of Far Cry villains Vaas, Pagan Min, and Joseph Seed in a sort of roguelike mission structure that blends what we know about each villain's backstory with trippy reality-bending world design in that mode, which will be released in instalments sometime after the base game's release date.
Pagan Min was, of course, Far Cry 4's antagonist, and tigers were prevalent in the fictional province of Kyrat, so this could be a sneak peek into the DLC's strange, brainwashed feelings. I don't recall tigers donning robotic armour in Far Cry 4, but sharks can fly, so anything is possible.
Regardless, when Far Cry 6 comes later this week, we'll learn everything there is to know about the mythical island of Yara and its secrets. Here's when Far Cry 6 will be available in your timezone, broken down by area, as well as everything we know about the game so far, including gameplay specifics, Steam status, and trailers.