Actor Masashi Taniguchi who is known to play the role of Jin Takayama / Kamen Rider Amazon Alpha in Kamen Rider Amazons, recently had been announced to play the role of Kamen Rider Saber the Movie's main villain → the Eternal Swordsman Bahat / Kamen Rider Falchion. Bahat seems to be arabic word for Flawless or Pure.
According to Wikipedia,
A falchion is a one-handed, single-edgedsword of European origin, whose design is reminiscent of the modern machete.
Toei had mentioned that Kamen Rider Falchion is based on Phoenix. He will use Eternal Phoenix Wonder Ridebook to transform. He uses a modified Seiken Swordriver which can handle only a single Ridebook.
Bahat will have a broken face from where you can see metal wings coming out and he will be holding a black book which seems be the book where he was sealed as depicted in the teaser.
Kamen Rider Falchion is not only going to appear in Kamen Rider Saber the Movie, but also will be connected to TV Series.
Other than giving an video commented, he had also commented for Press Release and here's the translation.
I am Masashi Taniguchi. I will appear in "Kamen Rider Saber the Movie" as Bahat / Kamen Rider Falchion. Though it wasn't possible during Heisei, but this time I will get to fight Nichi Asa's Reiwa Rider. My cells jumped up. While listening to my inner self "The one inside me", I will hunt... no... I will punish Saber & others as Eternal Swordsman. Do support me. Let's meet at theater.