All this we have been thinking that who will Zack fight in Gaim Gaiden? The Answer is this Armored Rider!!
Well, he is not the original Baron & not even Neo Baron.
He is Kamen Rider Black Baron!! Probably this might be the Armored Rider form of Neo Baron's Leader → Shura. He uses Banana Lock Seed.
Ryoma will use the Genesis Driver first time in Gaim Gaiden to fight Kamen Rider Saver.
Please read this article to know more about Kamen Rider Saver.
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Woz carrying his King Sougo