Someone we haven't yet signed. The usual suspects will be sold, leaving us with Roberts as the obvious choice, but he shouldn't be a regular next season so shouldn't get it.
Assuming he's not sold which, sadly, isn't a complete impossibility then I'd choose DKD for captain. Roberts seems to have lost it for pace so won't necessarily be a regular starter.
I would delay the decsion based on who we bring in, personally wouldn't give it to Roberts as I wouldn't want that to influence his selection, I don't see him being a regular starter next season.