Destiny 2 will be 4K/60fps on next gen consoles, will offer free upgrades to next gen console versions and will have cross-play between generations within the same console family.

Old Destiny 1 content is being "remastered" (eg the Cosmodrome), so more copypasta that the series is known for. The enemies in this new expansion will just be reskinned Taken (who themselves were reskins of units from other factions).

Will this expansion actually be good? We'll see. 2019 Shadowkeep was utter garbage, but you'd have to find opinions from people who weren't no lifer addicts to discover that (outside of playing it for yourself).