The listing is up on TakaraTomy Mall

Here's a rough translation: (note "Legendary Generall Commander" has been changed to "Supreme Commander" and "Convoy (Beast Wars)" to "Optimus Primal".

Transformers Masterpiece MP-38 Optimus Primal Supreme Commander Ver.

Price : ￥12,960
Item No. : 4904810877523
Manufacturer : TakaraTomy
Brand : Transformers
Target Age : 15 years old+
Points Earned : 120 points
Package Size : W240×H240×D85mm
Battery : LR44 button battery x2 (sold separately)
Release Date : 2017-06 Late

※Left of photo MP-32 Optimus Primal is sold separately

Beast Wars II Movie Edition "Lioconvoy Crisis!" featured an appearance of supreme commander "Optimus Primal"!!

Recalling the black body of the original toy, newly modelled optional equipment parts are included with this "Second" version!!

Based on MP-32 Optimus Primal, matte black coloured fur and skin sections produce a profoundly different feeling to this deco.

Originally pictured in the toy versions box art, the connected handle Double Blade has been newly added. An offensive 2-way skull type hammer can be equipped as either a club mace or a "ball-and-chain" flail, with metal chain. Light-piping allows the hidden wild beast mask face to, even when being worn, emit light from its eyes (batteries not included). This new equipment can be connected to both sides of a weapon rack that mounts on the back. Fully equipped with new weapons and a berserker fury, let's summon supreme commander Optimus Primal now.

Contents:
Optimus Primal body (1), Cyber-Blade (2), Double Blade (1), Hammer (1), Beast Mask (1), Weapon Rack (1), Replacement Face (Robot Mask) (1), Replacement Face (Beast-Scream) (1), Face (Robot-Normal) (1), Face (Beast-Normal) (1), Character Card (1), Instruction Manual (1)

nb. Primal's original "Skull-and-chain" is neither a club nor a flail nor a morningstar nor a mace. There is no contemporary evidence that the traditional "Ball-and-Chain" was ever even used as a weapon anywhere, appearing only in collections and on coats of arms. This "Hammer" can have the Skull clipped directly onto the Handle for use as a Mace or be separated on its chain for use as a Flail.