This saga has no end in sight, doesn't it? Or maybe it does.
Under Glazer ownership, United is an obviously depreciating asset. So, the longer they stay the relative strength of United as a brand, compared to other clubs is only going to deteriorate. I'm assuming that they're not mentally ill(simple-minded idiots) and that they understand that. We're probably gaining less and less of younger fans in recent times compared to some other clubs, you all understand why. That will reflect in declining sponsorships, income, popularity, cultural relevance etc. in the future. Winning is essential for all of that(contrary to what that idiot Woodward thought), it's pretty simple.
Eventual path of United with their leadership is first midtable obscurity and then relegation and bankruptcy/administration. So, unless they really want to completely obliterate the club(maybe they're secret hardcore Liverpool fans, who knows?), they have to sell the club at some point - it would be incredibly foolish, brainless not to, from the financial point of view.
It's better for them to sell while the club still has big brand value and is at least battling for top 4 in the PL, before the midtable irrelevancy phase that is coming eventually with them staying, or even worse(bankruptcy/administration/relegation).
So, my guess is that they're not witless idiots and that they will sell the club while it's still at least somewhat relevant as a brand(like, right now). They're probably not going to wait for significant further depreciation and the next destructive phases I've described above. Club clearly needs significant money injection that they can't/won't provide(Old Trafford, Carrington facilities, debt interest rates...), there is no space really for more debt.
This current sale process might drag on for a long time, like a war of attrition. It might even take a couple(maybe up to 5) years, but they likely will be gone. The club is a ticking time-bomb and the Glazers are getting closer at blowing it up. They probably have no choice but to sell, even reluctantly.
Keeping hold of this club in status quo doesn't make financial sense in the long run, unless the Super League project is revived, but i hope it's truly dead and it won't come back. At least it looks like it won't, there is no significant buzz, support for it from what i see. Doesn't fit culturally with European philosophy of sport and competition.