I wonder if Hayato and Daichi had visions of the future like Kento did, and that contributed to them going rogue? Maybe they all saw the world ending or some similarly bleak future, but chose different ways to try and prevent it: Hayato by merging our world with Wonder World, Daichi by obtaining the Table of Revelations and finding the traitor within SoL, and Kento by sealing all the seiken?

I'll keep that as my headcanon unless the show proves otherwise, since it would be kind of odd for Kento to have a face-heel turn from the same source as the previous two Caliburs but for a totally unconnected reason.

The trailer for Saber's prequel special already put up a scene of Hayato experiencing a bad end with Kurayami and asking Daichi about it.

Daichi is also guaranteed to see some potential futures, since he already alludes to it in the show. Like the: "What if you everything you know and do are already written down?!" he said to Touma one time.

New pic showing Calibur VS a new rider it seems. From the color scheme it's probably the last seiken rider.

Hmm, the big sword he's holding kinda looks like Gekido. Doubt it, tho.

But this also means Kento will be Calibur up till May maybe.

There's always room for a gold, final boss character. Big sword could be a claymore or broadsword.

Will Ryo, Daishinji and Reika die soon as their swords get passed on to the next?

stop asking for deaths in a kids show every week...

And technically we've already gotten the Buster pass down given well you know... the Buster Manga having a different Buster to start via Mr. Kame.

So does Gekido not count as a zweihander since it's a big sword that you need two hands to use (at least most of the time)?