The SPL chairmen and chief executives will vote on whether to allow a newco back into the division straight away – or force them to start off in the Third Division.
But Mitchell believes they are compromised and the final say on the crisis-hit Ibrox club should be made by their colleagues at Hampden.
He said: "The chairmen have the bank manager on their backs. They have also got fans on their backs now. They are caught between a rock and a hard place. It is an invidious position. It is so difficult it should be taken out of their hands.
"The SFA must step up with some leadership and take this decision away from the chairmen who are absolutely compromised in this. It is a no-win situation.
"I think Charles Green will use all kinds of incentives to sway this vote. I don't think it should be left to the SPL chairmen.
"The situation with the SPL is dramatic. The season is supposed to start in about six weeks. The TV games need to be chosen."
Mitchell doesn't believe Charles Green should automatically gain control of Rangers newco and wants to see other interested parties allowed to bid for the Glasgow institution.
He added: "What should happen is that Rangers should go to the Third Division, like Napoli, Fiorentina and even Juventus, go down with humility and with contrition, cleanse their brand, concentrate on Scottish players for three years and come back stronger. Everybody would respect them for that.
"I don't think it will happen. I think Charles Green will offer all kinds of incentives on voting rights, shares of money and the like to make sure he gets the votes he needs.
"We need leadership now. The fact is there isn't any leadership. Stewart Regan is new to this and maybe he has the freshness needed to come in and say: 'This has gone on long enough. I want to know who is running Rangers, I want to know what their interests are and whether they are the best for Scottish football'."