Odds are that the Ryudonna and ZaKing trademarks are fake. They came from nowhere and the trademark bot account (which is where official trademarks for toku and other things go) haven't tweeted a single thing about it.

Yeah, that would make sense. After all we didn't get a trademark for a Kamen Rider Blades immediately after Saber dropped from what I recall.

Now THAT'S dedication. How on earth do you have space for all of that?

And one who's a president! I'm a little relieved those other two names are (apparently) fake, since it means I can let my silly theory go XD

I bet the form changes are just jeans of different styles. :lolol

I personally really want Revice is not human Rider...
I think it would be really interesting if Revice are android Rider while the Secondary Rider is human....

Uhh...*Sees Kamen Rider Kikai glaring at Blade Fang* :lolol

Revise/Revice appearing right after the "Kamishiro Ryoga/Durendal Yugioh Zexal/Shark" reference in Saber reminds me of something.
The first boss monster Ryoga/Shark played was called "revise/revice dragon" (or so was it romanized at first) but the name was intended to be "Leviath dragon" (as in leviathan)

Maybe the pun is on Leviathan

Oooooh good call. Knowing how much Toei loves double meanings behind their Rider names, I could see it being a play on "leviathan" AND "device". It might be a bit redundant to have two straight Riders with mythical beasts as a motif though.

Denim jokes aside my guess is it is a portmanteau of revive and device.

REVIVE + DEVICE = REVICE

Hmm... maybe a rider who fights mechanical zombies. Or maybe Revive + Device + Ice making it a season where Revice fights zombie frost giants?