For starters, Kamen Rider Woz will get a new form thanks to the Woz Gemini Miride Watch. This Miride Watch combines Kamen Riders White Woz and Black Woz to become Kamen Rider Woz Gemini! In addition, Tsukuyomi will also transform into Kamen Rider Tsukuyomi thanks to the Tsukuyomi Amaterasu Miride Watch! It can also change modes, transforming Tsukuyomi into Kamen Rider Tsukuyomi Amaterasu. All of these are scheduled for an April release.
Next is Kamen Rider Ja-O, who transforms using the Oma Driver and the Ja-O Ride Watch. In addition, he can use armors based on evil Riders. His first two armors are: Cronus Armor (using the Cronus Ride Watch) and Evol Armor (using the Evol Ride Watch). All of these are scheduled for a May release.
Finally, using the Saikyou Maoh Ride Watch, Kamen Rider Zi-O transforms into Kamen Rider Zi-O Saikyou Maoh Armor. This form allows him to gain access to all final forms of the Heisei Kamen Riders. In addition, once combined with the Singular Ride Watch, it transforms Zi-O or Ja-O into Kamen Rider Shin Zi-O or Shin Ja-O. Their finishing move is called "Singular Time". All of these are scheduled for a June release.
[Source: TheRealMattHunt]