I mean if you've been with destiny since the beginning they change up what they said drastically often. Granted I would love nothing more than to play destiny for 10 years but from my understanding they are going to develope destiny as much as they can do we may see destiny 3 but after that it doesn't look like it will be as much maybe a different title. That also doesn't mean they can't keep releasing new content for it just not as fast as they already are, if you can consider this pace fast.