@Enzeru:
We can't really say anything about the fighting capabilities of Yonkou commanders at this point due to simply not having seen any others- beside Burgess and Whitebeard's guys of course- in action. Some of them might go down against admirals quite easily, but at the same I'm sure that there exist a lot of them capable of at least stalling an admiral, if not going toe-to-toe with them. It's wrong to underestimate both admirals and Yonkou; that much is certain.
Oh, I fully believe that some Yonkou commanders are capable of stalling admirals. If the powers match in certain way, like Marco and Kizaru, they might even… well, maybe not win, but most certainly tie.
What I refuse to believe is that every Yonkou has at least three guys capable of defeating Admirals. That's just stupid.
And while we are on the topic, I also refuse to believe that Admirals would not stand a chance against any of the Yonkou. Those guys dodged or survived attacks of a monster like Whitebeard. Taking them down should a great feat, not something every Yonkou can casually accomplish.
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... But then again, I'm biased towards Admirals, so anything is possible.
Anyway, back to proper topic. Considering the current situation, who do you think is going to be revealed first: Big Mom, or Kaido?