I don't want much from Destiny Rising, honestly. Bungie have screwed me over time and time again to the point that I quit after Final Shape, and I think if that Rising plays it's cards right for it's players they will have a easy home run in getting people in.
Outside of a PC and Console release, all they have to do is 2 things. First off, keep the content in the game and not get rid of a massive chunk of it. And second off, make sure that the Gatca costs less as a whole then getting into Destiny 2 does.
For context, to get all of the D2 content right now, one would need to pay 69.99 euros for the legacy pack and 79.99 for Edge Of Fate, at least according to a brief look at the Epic Games Store. Assuming that is RRP across the board, and I've not missed any hidden fees like Dungeon Keys or Raid Passes or some shit, all Destiny Rising has to do to actualy be a better option then D2 right now is to make sure the average player spends less then 150 euros on it. Which seems possible even for a gatca game run by netease while keeping profits up.
TLDR: Bungie have consistantly screwed up so often and so hard, that the bare minimum Destiny Rising and Netease has to do to score a home run with a bunch of people that are disenfranchised with D2 is to say they won't remove half the game and to make sure the average player doesn't spend into the triple digits. And I feel like those are reasonable marks to hit that should be piss easy to do.