That is not how business works.
Unless somebody localizes Valkyrie Romance or whatever AND hands it over to Nutaku to sell, it won't happen. Heck, even if that were to happen, there's no guarantee Nutaku would bother.You make it sound like Nutaku had something to do with Koihime translation. They didn't. MangaGamer translated it, and later allowed Nutaku to re-sell it for them.
And MangaGamer has explicitly said multiple times that Shin Koihime Musou is simply far too big of a game for them to invest in. So, unless fans pick it up, it will never be translated. Ever.