Last October a science fiction author, Matthew Kelsey Martineau, launched a lawsuit against Bungie focused on a Destiny 2 enemy faction, the Red Legion, which Martineau alleges is based on work from his Wordpress blog (Thanks, GameFile).
Naturally something on the scale of Destiny 2 faces all sorts of speculative lawsuits, and this didn't seem something that should've unduly troubled Bungie's lawyers: Except for the fact that the content in question no longer exists in the game.
Bungie's response to the suit was filed in December, and airily dismisses all of Martineau's claims, but the interesting aspect is that those claims relate to the original Destiny 2 campaign, which is about a war against the Red Legion.
This campaign was subsequently «vaulted», Bungie's preferred term for removing content from the game, and is now unavailable to play.
So the lawyers had to rely on the game's own fans in order to prove their points about the content in question to the court.