I'm highly sceptical over what's going on here.
Based on the way journalists are talking, we're looking to be further out than just having him sign on the dotted line. The clubs don't seem to be coming together on anything.
If we don't agree, it makes sense for Dortmund to sign him down to a new deal, holding up his valuation(Palace did the same thing with Wan-Bissaka).
Sancho is also not "dead-on" to join us. I think he's interested in the project and Dortmund are willing to sell for the right price.
If this goes till next season, I can't see us signing him.
Its imperative we sign him. If we don't, I see the alternative being Wilfried Zaha, who not only isn't of the same caliber, but seems like a small club player. We're stupid enough to do some nonsense like that.