Then again, this shouldn't be too surprising, since Rockstar has a tendency to cook its meals for a good long time — just look at how GTA V was delayed. Not too long ago, in an earnings call to investors, Take-Two Interactive representatives confirmed that Rockstar Games is indeed working on new projects, most likely meaning new games.
This immediately kicked off a massive avalanche of speculation going around both the press and the fans. What will their next game be? When will it be announced? When will it be launched? How many projects are they working on? Is GTA 5 story DLC one of those projects?
Well, in order: We don't know, most likely at E3, not sooner than the next financial year, we don't know that either and unlikely.
It was in the same call to investors that a small but more than significant tidbit of info was also dropped: All of the products Take-Two plans on launching in this financial year have already been announced. Financial years, like academic years, do not line up with calendar years (screw whoever came up with this), meaning that "this" financial year won't end until April 2017.