Kamen Rider Genm Part 2 Legend Gamer Stage will feature Ex-Aid, Brave, and Snipe getting forms based on Pac-Man, Family Stadium/Famista, and Xevious respectively. This story will premiere in February 2017. The Gashat based on these on the other hand, will be available in March 2017.
Kamen Rider Genm Part 3 Final Legend Stage will feature Ex-Aid and Genm getting forms based on Taiko no Tatsujin, and Kamen Rider Battle: Ganbarizing respectively. This story will be released as a DVD special in April 2017 alongside with the DX Taiko no Tatsujin Gashat in one set.
[Source: Kamen Rider Facebook]