This is definitely the Movie rider.

If this is in the finale : why ?

the suit looks cool. But why. Why should I care for that guy motive when he appears (and disappears) just now. Is he Ark again or something ?

Given the tron lines, I'm guessing he's Zero-One from the future.

So now the amount of drivers in Zero-One equals the amount of riders in Ryuki if you don't count the Alternatives.

Damn Bandai, You are straight cold-blooded with how many wallets your killing.

Where are you getting 13, I only count 12? Or are you counting the two forms of the Ark Driver as separate Drivers?

Hi there, Kamen Rider Rogue

Apparently Ark Zero and Ark One do count as different drivers, yeah

Bad*ss suit! Calling now that his name will be One Zero.

I hope the new Rider is not sign of cliffhanger final episode..

I personally didn't want cliffhanger final episode again because we already have cliffhanger final episode in Kamen Rider Decade series.....

It's a faceplate swap like kuuga, gaim, and others alike 01 to 02 Ark Scorpion and now this one. Arc 0 and Ark1 is the same driver with a flip gimmick. 2 in 1 like the hoppers from kabuto.