Decade only airs half the year, the story will be 30 episodes long. It's shorter than the usual airing, but by the same token, everything will be compressed into 30 episodes! Each and every episode will be filled with wonderful content.
Since this is an actualization of a battle between Kamen Riders, you can see which Rider is stronger. And the mystery around 門矢士 and Decade will be revealed as it goes. I think you'll enjoy watching it. Personally I feel very touched to be a part of tokusatsu. I want you all to feel that. I want you to feel the world of Decade.