[KabuSento]

From everything released and rumored, I’m getting an interesting mix of Ryuki, Blade and Den-O. Ryuki and Blade for the knight motif and possibly the title only fitting the lead Rider, fantasy lore in the story. So I don’t expect the other Riders to also have a sword, different weapons per Rider seems the most likely for a diverse toy line.
And Den-O because of the rumored/proposed fairytale/fantasy motif. Den-O did Japanese and various folk characters for the Imagin and with good PLEX designs I could see knights and fairytale working well together. Fruits and Warriors worked really well, so.

As far as books as gimmicks, I could see each Rider using “Pages” from their own books. I really liked the Progrise Keys being access key cards and how unintrusive they were to Zero-One’s designs. I think following Zero-One’s design standard wouldn’t be bad for the Reiwa era going forward, simple, recognizable but modern. It’s also easier on the suit actors.