I think my dream scenario for a Destiny continuation would be a retelling of Destiny 1 & Destiny 2, which then leads into a "Destiny 3" in one big "forever game".
I think having the entire story in one game which can be played start to finish would be incredible.
They'd also have the opportunity to tweak classic experiences to improve the gameplay or storytelling such as:
- Improving Destiny 1 campaign mission structure (perhaps merging multiple missions into one for legendary campaign missions)
- Adding dungeons as supplemental content to Destiny 1 storylines
- Restructuring campaigns that have too much busy work, such as Shadowkeep & Beyond Light.
- Fixing stories by pulling aspects from seasons (looking at you Lightfall)
Honestly I feel like there's just so much potential in this, and I think would be a great middle ground between people who want D3, people who want a D1 remake and people who want a D2 classic.
Obviously, I'm no game dev so I have no clue on the logistics of something like this. I just know I'd LOVE something like that.