Yes, I know that my claim is a very far fetched theory at the moment, but after reading the newest chapter, and looking at a panel of several revolutionaries with Dragon, I noticed a fairly familiar figure.
While the figures body isn't as 'bulbous' so to speak, the face bears some resemblance to the shichibukai, with the ears speaking for themselves. However, this could just as easily be a revolutionary who looks similiar to Kuma. We know that revolutionaries may well wear animal masks and ears from the picture of the revolutionaries that save Robin in the Bridge Kingdom.
We do however know that Ivankov has some history with Kuma, even considering him a friend. Could this be from where?
Anyway, I could be just jumping to conclusions. What do you guys think?