But Barry Ferguson might just be throwing a major spanner in the works now that they're almost in through the front door.
He arrived as a caretaker at a moment of crisis and absolute chaos. But after three weeks in the post already he looks every inch like a man who was born to be a Rangers manager.
So when the team of lawyers acting for Andrew Cavenagh and Paraag Marathe finally dot all the i's and cross all the t's on the deal to take over the club, the new owners will face a massive question over what to do with this force of nature who has ended up calling the shots from the dugout.
To knock Jose Mourinho and Fenerbahce out of the Europa League was one thing.
But to follow that up by leading his team of perennial underachievers across the city to win at Celtic Park? That just might have tipped Ferguson over the top in terms of his credentials to take this job on for the long haul.
Come to think of it, if Cavenagh and his star-spangled regime were of a mind to bring in their own man, then they may find themselves having to hurriedly reconsider.
Asking Ferguson to step aside now that he has reconnected the club with its supporters and lit a fire under his side would seem a strange way to go about winning over the hearts and minds of the locals.
They were chanting his name again yesterday afternoon as Ferguson led his players towards the 2500 away fans inside Celtic Park a support which, for the main part, had turned up in hope rather than in expectation.
But they too might be starting to realise that Ferguson is a great deal more than just a stop gap or the right man in the right place to mind the till on an interim basis. He just might be the right man period.
In the grand scale of things, of course, this was a derby which was rendered almost meaningless given Celtic's vast superiority in the top flight. It meant nothing and everything at the same time.
In time, Celtic fans will get over the disappointment of watching Ferguson celebrate and conclude themselves with another league title on the way to a domestic clean sweep. But none of the blame for that lies at Ferguson's door and he's done enough in a short space of time to make himself look like a serious candidate.
Of course, his job - and that of right-hand men Neil McCann, Billy Dodds and Allan McGregor was made a little easier yesterday because of the absence of Celtic's skipper and talisman Callum McGregor.
So often McGregor has dominated this particular fixture from the middle of the pitch and, without him in there to direct the traffic, Celtic's engine room spluttered and stalled from the outset.
By contrast, Ferguson's players were turbo-charged from the moment he sent them out of the away dressing room.
They came charging out of the traps from the first whistle as if Ferguson had convinced them their lives depended upon it.
And they were in front after just three minutes when the magnificent Nico Raskin got his head on an inswinging corner from James Tavernier.
Raskin is one of those who has benefited from a series of one-to-ones with the manager and his staff.
They see a player in the diminutive Belgian but have felt a need to drag it out of him.
And Raskin has responded to this mentoring by finding the kind of form which suggests Scottish football may only be a staging post on his way to one of Europe's biggest leagues.
His clever header created the second goal, for Mohamed Diomande, and at that point it felt as if this game was getting away ...