What is this nonsense being spouted that the No 7 shirt was "never really a thing"? It absolutely was and still is, there are plenty of people who have said as such over the last 20+ years, including SAF! I understand that some fans may not put a lot of stock in it, and that is absolutely fair enough, but to say that nobody else does is either a flat out lie or an incredibly oblivious comment.
It will almost definitely go to Sancho provided the deal get's over the line. As others have pointed out Adidas (who also would never for a heartbeat pretend there is not huge sentimental value attached to the number) won't miss a marketing opportunity like this.
Having said that, I personally wish it would go to Greenwood. It'd be nice if Sancho donned the 11 in my opinion, but I think everyone knows it's probably destined to be the reverse.