As far as I know, AAF hasn't said anything about a stop specifically in Cocoa, even though they have alluded that they are open to more infill station in the future. I do remember that Brevard was interested in building the stop with county money, so that passengers could connect to the port and the cruise ships there. Here's a
LINK for that.
The county would be justified in financing a stop because the easy passenger connection (direct from the airport, no less!) would bring more cruise ship business to the port.
And if there is one thing we all know, it's that if the prospect of government money exists in even the smallest possibility, no one will be willing to finance the station on their own. Not even AAF. So I wouldn't expect to hear much about this station until a deal with the county is announced, or the county completely trashes the idea.
I agree that Cocoa is an ideal location for a station; the trains will already be going pretty slowly through there to make the turn off the existing mainline onto the expressway line. It's just a matter of time before such a thing happens, though unfortunately that amount of time seems to be highly dependent on politics.