Super large box art image of MG Gundam Deathscythe EW confirms that the unit, and most probably future MG releases of Gundam Heavyarms, Sandrock and Shenlong are based on Gundam Ace's new Gundam Wing manga series "The Glory of the Defeated".
Click for super size view:
September 22nd release, 3,990 Yen (inclusive of tax).
Image is from
Amazon Japan.