I can’t see Tony Abbott challenging, I cannot believe that Dutton challenged, he was never going to have anything like the numbers. The party knows that whoever leads into the next election, Turnbull, Abbott, bishop or Dutton, that Dutton would be the least likely to win.
In hindsight, Dutton did very well considering MT called a snap vote. As its a public vote, some Dutton supporters would have potentially kept their hands down and history has shown the PM never gets challenged only once and usually dumped on 2nd attempt.
Turnbull cannot win, they know that and will go. Likely resign.
Abbott, won't win either, last thing they will do is repeat Rudd-Gillard-Rudd, so he won't contest
Bishop, won't get PM and if she does, only because no one else wants it. Way to much baggage.
Dutton, Yes, if not your typical PM wanna be personality.
Morrison, realistically he has some baggage but likely will be supported by anti-Dutton, anti-Bishop side and even pro Dutton, pro Bishop side as well. Likely he has best hopes of reducing the election loss, I think he is smart he will bring Abbott back to a senior role as this will win back the large portion of Liberal supporters that were driven away by the way MT treated TA.
As its a three way vote now, Dutton, Bishop and Morrison, the first round of voting could see another Tony Abbott style victory through accidental elimination.