Ramzzess Aviation Design, the developer responsible for add-ons like the SSJ-100 and other Russian aircraft, has announced a joint project with Philipp Avionics. Philipp Avionics is run by Philipp Muenzel, the creator of the systems for the Take Command! CRJ-200.
The Boeing 777-200LR will be a "Licensed by Boeing" product, featuring custom systems and avionics, including a custom FMC. More information about this upcoming product may be found in the official forum announcement thread located at X-Plane.org.