The DUP - who prop up Mr Johnson's minority government - toughen the premise, which they hope also can raise economic advantages to Northern Ireland and Scotland, but it has also been touted as a potential formulation to the controversial backstop.
It's not the first time Johnson has suggested a bridge between Northern Ireland and the UK.
But the judge said the main aspects of the case were "inherently and unmistakeably political".
"Virtually all of the assembled evidence belongs to the world of politics, both national and supra-national". Some 3,600 people died in the conflict.
McCord's lawyer, Ciaran O'Hare, said the Court of Appeal could opt to refer the prorogation issue directly to the Supreme Court or hold a full hearing on the issue on Friday that would ultimately be appealed in London if McCord lost.
Meanwhile, Mr Johnson's decision to suspend Parliament until October 15 has been ruled "improper" and "unlawful" by three senior Scottish judges, who concluded it had been done with "the goal of stymying Parliament".
The case was heard at Belfast High Court (Paul Faith/PA) One of the applicants was high-profile victims' campaigner Raymond McCord, whose son was murdered by loyalist paramilitaries in 1997.
A judge at the High Court in Belfast has dismissed a legal challenge against a no-deal Brexit.
The question of how to keep Ireland's border with the British region of Northern Ireland open is the key sticking point in talks to secure an orderly British exit from the European Union and avoid the economic disruption of no-deal exit on Oct 31.
The move backfired and emboldened lawmakers to defy him in Parliament. He also ousted rebellious Conservative lawmakers, including former Cabinet ministers and Winston Churchill's grandson.
The disclosure of the document - which warns of medicine shortages, severe delays at Channel ports and an increase in food prices if the United Kingdom leaves the European Union without a deal - was forced on the government by lawmakers, who voted on Monday to approve its release.
He added that he did not see border checks after a no-deal Brexit as a permanent arrangement, "not by a long shot".