At the risk of becoming eeyorish....
I hope you're wrong, or if you're right, that she is stopped before her plan gets anywhere.
I know you go on to outline some ways in which she can be stopped but she has very carefully ensured that everyone who is in a position to materially influence Brexit is, like her, an out-out-outer and those who aren't (like Hammond) will have to do the "hard yards" of dealing with the disasterous consequences of Brexit or be branded failures.
I think all those who were applauding her appointment of Johnson, Davis and Fox on the ground that they were bound to mess things up didn't realise that they were their to do her bidding, not to fall on their swords attempting to follow their own path.
As with the leadership battle, May has played it perfectly and completely skewered her Remainer opponents.
There are plentiful options, I'm sure a good deal of Tory MPs are less than enthusiastic about committing suicide for the sake of their PM getting a place in history.
What suicide ?
The only way they can commit suicide is to antagonise their (largely pro-Brexit) constituency parties by being pro-Remain and get deselected for the next election.
Right now in England there is no viable opposition to May's views. The Labour Party is in complete disarray and its position regarding Brexit changes daily as its leader vacillates. The LibDems do have a consistent and coherent position regarding Brexit but their years in coalition with the Conservatives have left them with an electoral "stank" which will take several elections to shake off.
IMO regardless of how disasterous Brexit is, the Conservatives will be elected with an increased majority. Labour will be battered and will lose dozens of seats to UKIP. Any and all problems post-Brexit will be blamed on "horrible foreigners" which in the English mind will reinforce the view that we were right to leave, no matter how bad the consequences.
If not, the courts could well stop the procedure - a recent lawsuit alleged that EEA membership is a separate issue and must be decided separately.
The Conservative Party will be able to legislate around this. The Conservative MPs, no matter how pro-remain will not dare to risk being deselected and their isn't enough of a functioning opposition.
Time is not on Theresa's side, she has about three years until the next election, and Brexit procedure will take at least half of that.
I disagree...
If there's some kind of short-lived post Brexit bounce (the pound crashing will briefly make exports more affordable before the import-related inflation takes hold) then she can claim credit and surge to victory.
If it's all still a bit of a muddle then she can claim that "we need to see this through for the good of the country", just the soft of guff that the English electorate are suckers for.
If it's looking bad then she can just blame foreigners, wrap herself in the Union Jack, say that we ought not to change tack in our hour of need and sail to victory on a wave of "Dunkirk Spirit" (which as any fule kno was an excellent example of a rapid withdrawal from Europe followed five years later by a glorious victory
(and a decade and a half of privation and poverty 
).
That said, you Brits are weird
McHrozni
For sure
.
