three series in a row now where the Final Boss is, at least technically, an evil Kamen Rider.
In the criminal justice system, the people are represented by two seperate, yet equally important groups: The police, who investigate crimes, and the giant robots, who do battle with the bad guys' giant robots. These are their stories.
Maybe it's easier for them to create an evil Kamen Rider rather than design something completely different. From a toys standpoint, an evil Kamen Rider is a nice collectible rather than let's say some random monster of the week, then again there have been exceptions where the big bad boss gets a figure too and is also good for collection. Maybe it's on them, maybe complacency is setting in..
Quote: "When I first started, I knew everything about nothing and have progressed in the subsequent two decades, realising that now I know practically nothing about everything"
An evil rider as the final boss means they can release a driver toy around the Q3 time, which is usually the last little bit they release toys for the season and probably encourages people to but them.
Cronut and Evol where both super popular, so they are onto something.
You can also sort of blame Black RX for that. Since Shadowmoon was basically an evil rider. It's a famous arc. I think Sagittarius was Rider-Esque form Fourze too.