Trotter on Shearer

I'm starting to get the impression that Chris Trotter is not hugely confident in Labour's ability to win. He blogs:

For a while, it looked as though Labour had found just such an emblem. 's story, like John Key's, begins with an ordinary bloke setting forth on a journey, during which he encounters all manner of monsters – from Somali warlords to murderous Israeli settlers – learning in the process the magic spells for opening the human heart to compassion, justice and reconciliation. He, too, returns to his people and, at the crucial moment, steps forward from the shadows to declare that he is the one destined to lay low the National Party usurper.

Except he hadn't learned the spells, or, if he had, he could no longer remember them.
It's as if Arthur stepped up to the sword in the stone, gave it a confident tug – and nothing happened. Instead of a sword flashing in the sunlight above his head, proof positive that he was “rightwise King born of all England”, the weapon stays exactly where it is, and the hero, with an embarrassed shrug, picks up a guitar instead.
There are, of course, many variations on the classic hero tale. Instead of acquiring forbidden knowledge and inheriting mysterious powers, the hero is often required to overcome a series of obstacles and/or eliminate a host of adversaries before completing his . In doing so he blazes a trail and lays a path for those who follow after him. Think of the Labours of Heracles, or Theseus's struggle with the Minotaur, or Luke Skywalker's destruction of the Death Star in Star Wars.
Does Labour have another hero? And, if it does, can we assume that the first obstacles and adversaries he must overcome are all inside his own party?
I wonder whom Chris might be referring to?