Looks like Oden's scar was so severe Kaido still had the bandages quite a while after their battle
Yet despite this, Ushimaru and 2 other daimyos got owned.
But I guess it makes sense since it was at the period after Oden's death and Hyogoro captured, with no other samurai having even close to their lvl of hype
Depending on where Oda aims at going with the Ushimaru stuff though(since his name was apparently not properly given in the FB), it might create some interesting build up between Ushimaru, the Shimotsuki and Zoro
I also like the fact that Oda added an explanation as to how Yamato could know what was in Oden's journal. Never made sense that she could read it. Now we understand why