Curt Schilling), a famed fantasy author (R.A. Salvatore), and a great comic book guru (Todd McFarlane)? You get 38 Studios, and 38 Studios is working on a new MMO codenamed "Copernicus."
Now the studio has licensed the BigWorld engine for Copernicus. Since the game is at a very early stage of development, we know very little about it at this point, except that its prestigious managers are optimistic about its future. Reps from both 38 Studios and BigWorld made nondescript statements saying things like, "BigWorld provides the most proven, robust, and technically solid game engine available," and "we are thrilled to be working with such a professional and talented group of game developers." Good for them!
Brett Close described the rationale behind the choice in greater detail in an interview with Ten Ton Hammer. Excellent server-side tech and tools that will help the team get the game to market as fast as possible were the given reasons.