https://www.polygon.com/2017/9/13/16301900/destiny-2-leviathan-raid-start-time-story-calus

Destiny 2’s first raid, Leviathan, will open to all high-level Guardians today, and you can now watch the official “teaser” for it.

We put the word in quotation marks because, well, it’s more like a 15-second GIF than an actual teaser for what players will be doing in the raid. There’s no gameplay footage or even a CG cutscene; instead, we see a plate of gaudy gold filigree in the grand Cabal tradition, which is inspired by the design of ancient Rome’s military.