There are millions of players for the Destiny game, and with numbers like that, one has to wonder when a sequel to the sci-fi MMO shooter will be coming out. There has been a leak about Destiny 2's release date that is probably wrong, but perhaps a better plan is not reinventing the wheel for a sequel, but more downloadable content (DLC).
In all honesty, a Destiny 2 at this present time seems odd with the release of "The Taken King" DLC. Even with this new content that was released last September, there has been new things unveiled like a previously unknown exotic sniper rifle Black Spindle. According to Gamerant, this weapon can be found in the Daily Heroic version of the mission "Lost to Light", and a lot of Destiny players have been talking about this a lot. There is even a new story mission taking players back to the Vault of Glass for more info about characters in Destiny's mythos.
In fact, Mashable called "The Taken King", which is technically an expansion, a Destiny 2. Perhaps the business model that Bungie should be adapting is not one of constantly coming out with a new version of the game every few years, like Grand Theft Auto, but just keep making DLC that will expand the weapons, enemies, and storyline.
Two months ago, there was a reddit thread passed around that was started by some insider who claimed to have knowledge of Destiny 2. This insider believed that Destiny 2, which will have the subtitle of "The Shattered Suns", will focus on Osiris as a quest-giver and take place largely on Mercury using existing characters and locations for another game. This supposed informant also claimed that "Hollywood writers" would be involved in the story, but Forbes has shunned this leak. It is possible that this insider knows something about a new DLC.
It might be too soon to talk about Destiny 2, but we have heard a lot about it. Venture Capital Post confirms that the next installment of the game is currently underway, from a statement from Activtion's CEO Eric Hirshberg. Gamespot also reported in November of last year that Activation Publishing has a ten-year plan for the game's storyline. This means that a Destiny 2, or whatever it will be called, is just one step in a massive storyline that has a long-term plan. An Activation representative still don't have anything to respond as far as the storyline is concerned, but the Latino Post states that this is underway.
David Dague has also stated months ago that players have a relationship with their characters, and there will be a "carry-over" feature will help nurture that. Dague has also seen the concept art for the sequel and the new exotic weapons, and is pretty optimistic of the sequel. This "carry-over" feature is a request from fans, and there isn't really any other video game franchise that does this kind of character development. Not only will this sequel offer some new and exotic weapons, but the player will be able to take their Guardian character with all his or her equipment, and carry it over to Destiny 2.
There still has been no formal announcement from Bungie as far as Destiny 2 is concerned. It would not be surprising if the next announcement was just for another DLC.