We are yet to see what Bungie is planning to do with Destiny 2, but thanks to a dedicated community of data miners, we might have the answer already.
Data miners have revealed what appears to be the official artwork on Reddit, and based on what we can see, they will release a new expansion and it will be called "Shadowkeep". Judging by this ad, the plot will take place on a forgotten moon which is...quite amazing.
We will see what Bungie has to say on the matter, the livestream is scheduled for tomorrow.