The S.H. Figuarts blog provides a teaser for a new figure based on Kamen Rider Brain.
Based on an April Fools prank made reality, Kamen Rider Brain is a new entry in the Drive Saga series for Kamen Rider Drive. In it, the Brain Roidmude must take on several dark Riders as Brain the Kamen Rider. The blog proudly calls him the last Rider of the Heisei era, and the first of the Reiwa era, as the two-part special will be debuting and ending in those respective eras.
Apart from a teaser image, no further information is given other than the confirmation that the figure is being made.
Source: S.H. Figuarts Staff Blog