This was mentioned in a email I just got that was sent out by Take Two just now reiterating its goals for the FY year in light of the Red Dead Redemption 2 delay from Spring to October.
"...Take-Two continues to expect to deliver both record Net Bookings and record net cash provided by operating activities, in excess of $2.5 billion and $700 million, respectively, during fiscal year 2019, led by the launches of Rockstar Games' Red Dead Redemption 2 and a highly anticipated new title from one of 2K's biggest franchises."
BioShock?
EDIT: As just reminded on Twitter, it's most likely Borderlands 3.
"...Take-Two continues to expect to deliver both record Net Bookings and record net cash provided by operating activities, in excess of $2.5 billion and $700 million, respectively, during fiscal year 2019, led by the launches of Rockstar Games' Red Dead Redemption 2 and a highly anticipated new title from one of 2K's biggest franchises."
BioShock?
EDIT: As just reminded on Twitter, it's most likely Borderlands 3.