It is confirmed that Shura is going to be Kamen Rider Black Baron Banana Arms. The reason why he had transformed into similar body as Kaito's Baron might be because they both were aiming to get greater power.
It is also confirmed that Ryoma's Predecessor Kugai Kudou is going to be Kamen Rider Saver. Kamen Rider Saver's Arm Change is called Zakuro Arms even if the Sengoku Driver calls out Blood Zakuro Arms.
By the way, have you taken a closer look at Kamen Rider Saver's Suit?
The Shoulder Part on both side's are different. On the Right Side we have the Shoulder Part of Blood Orange (of course from Bujin Gaim) then on the left side we have that of Zakuro (from Ringo Arms).
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