Personally, I think new DC will be Phil Parker.
On other hand, I would like to see Dan M brought back to IC. He has a passion for Iowa football and he is only DL coach at Florida. Meyer picked someone else over him as DC last year.
It would come down to the relationship Kirk has had with Dan. I have no idea what that may have been when they were coaching together. Also, there is still possibility DM will get head coach offer elsewhere too.
If not selected as DC, assuming Norm does retire, I think Phil Parker will go elsewhere within a year. He has turned down other offers to stay at Iowa but dont see him staying long if not selected as DC.