Recently December scans for Kamen Rider Build have surfaced online which reveal some of the events that will be happening throughout the month on the show.
Keep in mind this article contains spoilers so read at your own discreet.*
First, with the previous events of the series Sento will soon be using a new Full Bottle called the Rabbit Tank Sparkling Fullbottle. This special Full Bottle will allow Sento to access all of his weapons without the need of the other Full Bottles.
Next, it seems that Sento and Ryuga will soon be fighting each other due to some disagreements. While they fight the Hokuto government will soon be making their move.
Thirdly, Sento will be receiving a new Best Match called Octopus Light. As the name states, Sento will need the power of the Octopus & Light Fullbottles to achieve this form. The form will be able to constrict enemies with the power of the Octopus and blind them with the help of the light bulb.
Fourthly, a new Best Match will be featured in Kamen Rider Heisei Generations FINAL. Sento will become Phoenix Robo, the Immortal Weapon (Fujimi no Heiki). The returning riders in the film will become their final forms, sans OOO. Kamen Rider Build and Kamen Rider EX-Aid will team up in the film to battle against the fusion of the Kaizers known as the Bi-Kaizer.
Lastly, not surprisingly Kamen Rider Build will have a new Best Match for the Hyper Battle DVD. He will become Kuma TV (Bear Television). The Hyper Battle DVD will be released in February 2018.