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Do you think that guy in the right side final panel fit the description of "Kaido of The Hundred Beast" ?
First, he somewhat fit the description of being a "beast" with that viking helmet and the fur coat. I know it's too small to make a speculation on but even though it's only two point, he still kinda fit the description of a 'beast'.
Secondly, watching the broadcast alone made this speculation seem possible due to him being related to the underground and possibly wanting to check on the latest weapons created by Caesar since Caesar himself describe the experiment as a 'big thing' and he made it sound like it's his best work therefore it wouldn't make sense for someone like Kaido; one of the biggest buyer of Caesar's creation not to watch the broadcast.
And finally, he's the only one among all the 'shadow figures' who doesn't seem calm unlike the other 'shadow figures'. Put in note that he even state a person's name; Jack. I know the name stating thing isn't much but for some reason, it stood out from the rest. Plus, it seem that he's his subordinates to tell this 'Jack' person about what just transpire.
The only thing that could made this theory seem impossible is when Law state that Kaido is the 'strongest creature in the world' making it sound that he might not even be a human.
I got this picture and theory from another site.
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From down on the right side, we have Eustass Kid, Shanks, Killer, Blackbeard, Basil Hawkins, and....?
Left side, we have Jimbei, Sakazuki, Donquixote Doflamingo, Kuzan, Scratchmen Apoo, and possibly Big Mam.
Since Big Mam is there, maybe the other guy is Kaido?
I mean, IT IS his saga + Big Mams.
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