Hakuouki is the most profitable otome game to Otomate from what I've seen and the huge amount of merchandise, events and so on somewhat supports that statement
For those interested the new Hakuouki game is called
Urataka Hakuouki and the new characters have been revealed:
Takasugi Shinsaku - CV: Tomokazu Sugita
Young leader in remorse of his deceased teacher.
Connection with Harada: through Shiranui (both anime and game did mention it).
Katsura Kogoro - CV: KENN
“Run away with a reason.”
Connection with Saitou: one is Joi side and one is Shogunate side. Fated to be enemies (he appeared in the recently licensed musou game by AKSYS Hakuoki: Warriors of the Shinsengumi)
Okada Izou - CV: Suzumura Kenichi
Sad killer following his teacher’s orders.
Connection with Okita: two insane swords shining in battlefield.
Thomas Blake Glover - CV: Sakurai Takahiro
Mysterious weapon merchant.
Connection with Heisuke: an invisible line links them.
I'm sure this is going to have an anime someday.
And about the Hakuouki movies still no information I think.