There are probably only a few characters from the Star Wars prequel trilogy who are interesting enough to warrant their own sixth-scale figure...but I believe General Grievous would be one of those.
Sideshow Collectibles has announced the pre-order release of their Sixth-Scale General Grievous Figure. Slated to begin shipping in February 2014, you can pre-order one now for $249.99.
The General Grievous Sixth Scale Figure features:
• Fabric Cape with, clasp, lightsaber hilt pockets and detailed lining
• Swap out Left & Right Fused Arms
• Swap out Left & Right Split Arms
• Four ignited Lightsabers
• Four (4) Lightsaber Hilts
• DT-57 "Annihilator" Heavy Blaster Pistol
• Electro Staff with removable energy clusters
• Display Base with pivoting figure support stand
• Sideshow Exclusive: Battle Damaged mask for alternate display
