Cook would be fine if he worked on his captain skills! All the resource he has and people he can get advice from, and yet he still doesn't seem to be improving as a captain! If there is no improvement soon, then surely they will have to offer it to someone else?
It would have to be someone who has cemented his place in the team!
I can only think of Bell, Anderson and possibly Broad as options? Even Prior is not a definite to keep his place!
Root may have gone some way to cementing his place, but both Root and Bell don't seem the type!
Anderson doesn't seem interested in the role. Broad would probably look the role and has experience so at the moment, I can only see Broad or Cook as options - neither of which seem ideally suited!