Next Leader of the Libs: Your view?

Ok guys,

It is becoming very very clear that one of two things will happen:

1. The Libs lose the un-losable upcoming election and the failure is directly related to Turncoat Turnbull?
2. The Libs scrape through the upcoming election, only for MT to be overturned in a spill due to his very apparent leftist views and unwillingness to make a decision.

So, the options.

1. Barnaby Joyce?
2. Julie Bishop?
3. Scott Morrison?
4. Return of Tony Abbott?
5. ?????