at today's DOA festival, producer Hayashi has confirmed that they are indeed making the latest entry of the DOAX series.
rough translation of what Hayashi said
"There is a game where female DOA characters are having a vacation at south island. Fans having been asking for that game. It is actually the number 1 request from the fans. I have been acting as if I was ignoring these requests. But we have actually begun developing that game, the latest installment. It's still very early in development so we can't give more details, but I want to announce today that we are making the game."
rough translation of what Hayashi said
"There is a game where female DOA characters are having a vacation at south island. Fans having been asking for that game. It is actually the number 1 request from the fans. I have been acting as if I was ignoring these requests. But we have actually begun developing that game, the latest installment. It's still very early in development so we can't give more details, but I want to announce today that we are making the game."