Kojima had always planned for The Phantom Pain to be his final title in the series, but he and his team reportedly spent the past year of development working under constant surveillance by Konami. Especially since they went to the trouble of scrubbing references to his name from all the promotional artwork for Metal Gear Solid V.
Given this relatively lukewarm to the first game in the series without Kojima, it's possible that Konami may decide not to expand the franchise any further.
Konami's MGS spin-off Metal Gear Survive has entered the United Kingdom chart at respectable enough #6.
According to a screenshot coming from the Metal Gear Survive, indeed, it looks like the new development team wanted to pay a homage to the original Kojima Productions squad behind the making of Metal Gear Solid V: The Phantom Pain (and all the previous entries in the series).
The message is hidden within the game's character creator, in which the player is shown a clipboard with their name on it alongside other soldiers.
Elsewhere on the list, two of the names have quite negative meanings: "Bastard Yota" and "Cunning Yuji" could well refer to Metal Gear Survive's director Yota Tsutsumizaki and its producer Yuji Korekado. Following the release of Metal Gear Survive, players have discovered that if they want more than one save slot, it'll cost them an extra $10.
Needless to say, Kojima himself has nothing to do with Metal Gear Survive, and when asked about it following the game's announcement, stated he feels zombies don't belong in the franchise.
Truth be told, even Metal Gear Online suffered from this issues, however, this is something we've been witnessing mostly in free-to-play games where the developers charge for additional characters.