I have no idea on how long Nendoroid Akechi Kokoro has been up in GSC’s website, but I have just seen her earlier today. XD
In any case, Nendoroid Akechi Kokoro from the upcoming PSP game Tantei Opera Milky Holmes 2 has a page of her own, but I guess there is nothing new there.
She is listed with August release schedule and priced at 14490 Yen – though I am pretty sure that there is a cheaper version priced at around 9800 Yen. XD
(Thanks for the news tip, Nurrafi Ihsan!)