This doesn’t mean we’re getting Destiny 3, but it does put the possibility on the table.
When Bungie launched Destiny 2 in 2017, the studio promised that it would provide at least 10 years of continuity for the space shooter, and so far it’s more than delivering on that promise. The year-by-year expansions make it clear that the Guardians‘ story is far from over (although the current arc does look set to conclude next year with Destiny 2: The Final Shape).