I wrote a post about this a while back. It's very likely this is Jinbeis turn to realize that not only is Luffy very special but Zoro is special too in his own right. In my previous post I provided examples of when each member of the SHP witnessed Zoros strength, this is simply Jinbeis moment of the same.
But I don't think Jinbei will show fear of Zoro. He will just acknowledge that just as Shanks has Beckmann or Roger had Rayleigh it's natural that Luffy also has an absolute monster as his #2. He himself was far too capable man to be a measly #2 to Fisher Tiger but it speaks volumes of the captain so I bet he will identify with Zoro and support him as he knows what it takes.