There's no doubt in my book that Wlad could beat Parker or Wilder, but they'll probably avoid him after that. And the thing is , that the reason that Wlad has had the career he's had is that he didn't think anyone could beat him these last 10 years, he knew he was no.1.maybe he can't motivate himself to be "2nd best."
Having said that he may wish to honour his TV contract.
I would respect whatever decision he makes.