As I mentioned in another thread, If I look at the whole list, Dustin Martin looks the most captain like personality to me. I'll speculate that he will overtake Cotchin in the leadership qualities when he's older (definately over take Deledio). Obviously I'm talking about this in the context of the future. He's only played a handful of games so would realistically be at least 3 years away from being considered for a position such as captain.
Hopper mentioned that it is a non-issue and that Newman can hold the fort for a couple of seasons while a new leader emerges. I tend to agree with this point to an extent, though it is really disappointing that Foley is so injury prone these days. To me he would be a much better option to serve this purpose than Newman if his body would allow him to get on the park consistantly.
As someone else said, If only Cousins was a few years younger ???