Someone on Discord has answered your question.
https://cdn.discordapp.com/attachmen...302/image0.png
THey are indeed Robo and Bio Rider.

Decade AND DiEnd will be reappearing in the next arc. :D

https://www.instagram.com/p/BzAY6A2h...d=csn8nxuap6hp

I still hope Another Decade will be appeared...:D

Maybe Another Decade is one of main enemy in final arc...

Since we have like 10 episodes left I hope Decade stays for the rest of the series. Although it is likely he'll be at least on the final episodes.

Quick question. At the end of the Hibiki episode Woz said he only needed 4 rider powers left to obtain. Kiva, Kabuto, Den-o and one more I'm not sure what was. What was that last rider power and why did it not matter to getting Grand zio

Drive, which will supposedly be covered in the movie.

So how does Sougo not remember Another Den-O, or the Den-O crew from the movie, but still have the ride watches from said movie?

So basically for the western audience we can't see how he gets Drives power for another 6 months.

We can assume though, probably gets handed the Drive Ridewatch by Gou.

We don't know how that's going to be handled yet though. The movie has been said to answer the mystery of the Drive Watch, but also has been described as taking place after all Watches are gathered and that it's the 'final chapter' of Zi-O.

In any case, the summary for next week's episode has Oma Zi-O saying that Sogo still didn't collect all Watches.