Seems Trilobyte are back in action and are crowd funding the third 7th Guest game lazily named The 7th Guest: 3.
Here is the snippet from Shacknews.com
QuoteTrilobyte is making another 7th Guest, this time targeting PC, Mac, Android, and iOS devices. The game, titled The 7th Guest: 3, will be ready in the next 12-18 months. The sequel promises a whole lot of fan service for devotees of the original, and will include some staff from the original games.
Studio co-founder Charlie McHenry told Polygon that the game will once again take you to a spooky mansion, full of puzzles and artifacts to explore. This time the Stauf mansion is "something of a historical museum" as you work to uncover the fuller mystery of the older games. The game may be launching a Kickstarter campaign next month, depending on whether the studio finds other funding.
Reference: http://www.shacknews.com/article/78120/7th-guest-3-coming-to-pc-mac-mobile-devices