KP wants to win Ashes back
The Kevin Pietersen factor is top of the list of any number of variables which may yet complicate England's 'new era'.
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Out of the adversity of a harrowing 5-0 Ashes whitewash, coach Andy Flower and captain Alastair Cook have both said they are intent on forging a successful future for their team.
To do so they will need to form a united front on issues of personnel and tactics.
They will not always instinctively agree, of course, and when it comes to Pietersen there is no compelling evidence yet that they do on whether he can still be a cornerstone of England's regeneration in time for the 2015 Ashes.
It was Cook who was reportedly the driving force behind Pietersen's successful reintegration, in autumn 2012, an achievement vindicated when the mercurial batsman played one of his finest innings to help the captain turn round England's fortunes on the way to a wonderful series victory in India last winter.
Scroll on a year, though, and there has been no such impact by Pietersen - or anyone else in an England shirt for that matter - in a hapless descent to the dreaded whitewash in Australia.
In its aftermath, Flower unequivocally committed himself to stay on as Test coach - adding he has great faith in Cook to put his stamp on a team for the future.
Pietersen's intentions appeared far from guaranteed, until he made them so via Twitter.
Flower, and Cook, may be interested to discover - if, like millions of others, they did not know already - that Pietersen wants in. "I want to thank all the England fans for their terrific support - and I'm determined to help regain the Ashes in 2015," he wrote.
"Very disappointed to lose 5-0, and not to score more runs personally. Tough tour against a top class team."
After Cook's duties as England's one-day international captain are completed over the next three weeks - no easy task against a rampant Australia, with a stack of damaging strokeplayers and wicket-takers at their disposal - he and Flower will have four months to work out, along with the selectors, a strategy for seven Tests next summer.
Beyond that lie just another five Tests, spread over 10 months, before Pietersen's quest for a fifth Ashes series victory begins - perhaps.
Advice for England's brains trust is plentiful, and one former captain - an Ashes-winning one at that - is concerned about a hasty and costly rejection of Pietersen's talents.
Michael Vaughan told BBC Radio 5 Live: "My fear is that England will make him a scapegoat, and England will feel that the only way they can move forward is without Kevin Pietersen.
"Cricket's got to be careful - because, while in football you can sign a new striker, in cricket you can't say 'you know that number four slot, let's go and pay £30million and get Virat Kohli in'."
Pietersen, 33, helped to establish Vaughan's own legacy - launching his career for his adopted country with a bang too, in that long-overdue Ashes victory of 2005.
He is one of just two survivors from that team, and the other - although worryingly below his best, like so many of England's whitewashed tourists this time - is not nearly so divisive.
Ian Bell, still only 31 and feasibly with another five years or more left him as a world-class batsman, was also on Twitter on Tuesday - voicing his own regret, to add to the collective, at England's under-performance over the past two months. "Devasting to lose 5-0. Thanks also to all the travelling supporters," he told his followers.
"Really appreciate the support through these hard times as well the good!"
Cook and Flower have spoken in similar terms, and in addition the coach also has an extra tip for the captain to try to make sure he reaches his potential as a leader.
Flower would like his one-time Essex protege to actively seek out former captains - the likes of Vaughan, or Nasser Hussain, presumably - and pick their brains on how he can improve.
England's miserable campaign down under has made that source of knowledge a necessity, rather than a mere option.
"It has happened before, but I think it might accelerate," said Flower.
"Definitely - that is part of the learning process.
"If you're inquisitive about your job you should be doing that - and he is inquisitive.
"I hope this situation brings a sense of urgency with that."