A DoF, MOST of the time is a long term appointment, not just for the term of a manager, everything ive read points to De Boer not even on the list anymore, which is quite baffling.
Seems strange though that we would target Overmars of all people considering his links to De Boer. However, likewise, I haven't heard anything really about De Boer and his brother saying there has been no contact is a telling sign.