Roboarts Diary disclosed images of Tamashii Web Shop limited Robot Damashii [Side KMF] Sutherland Sieg's prototype.
Overall length would be over 600mm, and will be quite heavy as well, as most parts of the body will be made of ABS. As revealed in the third image, each side block alone weights 256 grams, so the overall weight of the entire figure must be more than 600 grams. Comparison is made to the previous large release from Tamashii Web Shop - Robot Damashii [Side MS] Regnant, which weights 451 grams.
The figurine of Jeremiah Gottwald only weights 1 gram though. ^^
There are two pre-order periods for this Robot Damashii: first one from July 27th till September 2nd, price is 25,200 Yen (inclusive of tax); second date is September 3rd onwards (closing date TBA), price is 28,000 Yen (inclusive of tax). December release.
Images are from Roboarts Diary.