This is NOT about stopping Brexit! So, YABU, OP, to suggest that it is and to mislead others into believing the same.
One of the purposes of the case is to answer the question of whether or not a notification made under Article 50 could be revoked, for the following reasons.
"Parliament cannot conduct our negotiations with the EU. Only the Government can. But the Government possesses little or no democratic mandate for these choices: there is nothing about them in its Manifesto. So it must be guided by - and accountable to - Parliament. Only Parliament can speak for all of us.
The Government has promised to produce a plan for its Brexit negotiations. And to allow Parliament to scrutinise that plan. The Government says it will then notify the EU (under Article 50) that the UK wishes to begin the formal process of withdrawing from the EU. It will negotiate with the EU a withdrawal agreement and, likely, an agreement shaping our future relationship with our biggest trading partner. But what happens when it returns? How will Parliament hold it to account?
If we cannot withdraw our Article 50 notification then Parliament will have to accept those agreements - whatever their content. Like a Model T Ford, it will be able to choose any colour it wants, but only so long as it's black. The Government will have free reign to do exactly what it wants. There will be no control by Parliament.
But if the notification can be withdrawn Parliament will have a choice: it will be free to reject that deal. And, because the Government knows this, and because it wishes to deliver the result of the Referendum, it will have to try to do the deal that Parliament wants or it will risk the possibility that Parliament throws the deal out.
So it is only by establishing whether we can revoke Article 50 that Parliament can fulfil its obligation to deliver a Brexit for the 100%."
Surely, that's not an unreasonable question to ask? Brexit will happen. It will affect us all, for decades to come. Surely, we should have some say in what form it takes?
I am astonished that people who may have voted Leave on a "take back control" ticket now appear perfectly happy to relinquish all control to the government!