This doesn't last long; an accident occurs which causes Ryo to regain his memory and escape Badan.

A year later, Ryo begins his attack on Badan as they finish the preparations for their doomsday weapon: the Space Break System.

A coordinated attack by all of the Kamen Riders disables the Badancium 84 supplies needed for the Space Break System to work.

The other Riders get him to listen to them and only one truck full of Badancium 84 makes it to Badan's base run by Ambassador Darkness.

After being shown a video detailing the history of Kamen Riders 1 to Super-1, Ryo is amazed that there are others like him.

When Ambassador Darkness uses the Space Break System on the Kamen Riders, they synch their powers with ZX, using his ZX Kick to kill Ambassador Darkness and destroy Badan's base even as its Great Leader appears and bids the Riders farewell.

In Kamen Rider Spirits, several references infer that the Badan Empire was actually created by an alien entity, and supported terrorist groups starting with Shocker secretly working towards bringing the true form of their leader to Earth.