[quote]Maybe for Destiny 2 if its not too late?[/quote]
Given we're less than a month from the release and even less for the game going gold - I'm going with it's a little too late option.
Not saying your idea is bad, but you're asking for a system that would need to be conceptualized, designed, developed, tested, packaged, vetted for platform releases and then finally released for the end users.
Just don't see that happening in a short period of time that remains before the game goes gold and finally released on Sept 6th.
I do like this idea of getting rewarded in game by accomplishing certain milestones within the game.