Big decisions for Woody to make.
The only way that Sanchez can come back is with a new offensive minded HC (think A Smith w/Harbaugh). There is no way Sanchez can come back with Rex - the stadium would erupt at the first interception and there is really no path to success there. So Woody has to chose between keeping Rex and Mark, or just canning both.
If Rex stays then I say go get Alex Smith and draft a developmental player with a big arm.
They won't be able to afford Smith. Some team like the Chiefs or someone will give him Flynn money.