Re: Sengoku Rance
I guess you'll be able to expect remastered graphics and the like. Additional stuff like an expansion, new characters or so? Don't count on it. Look at Shizuka, she was added due to the fans complaining a lot about her absence, and she only got two recruitment lines, while also being locked at hate. She's pretty much the only addition to the game after release.
Of course, you can check out that Kichikuou Rance mod for Sengoku, last time I saw it, it was pretty sweet.
All in all Sengoku was a bad spot for mangagamer, on one hand, everyone has played it already, and that was years ago, so the profit will be much lower than Quest Magnum, no doubt.
On the other hand I don't think Alicesoft would be happy of Mangagamer ignoring one of their best selling games ever due to a previously released fan translation. Also, if they truly intend to bring out every Rance game, they cannot ignore Sengoku.
About the monster realm, Rance X is the one that'll cover that place.