That's very optimistic, and still doesn't solve the stability issues of the Pac12 or reconcile the fact the Big 12 has leverage from the top brands making more coming to the Big 12. Which is easier if the football content is unloaded from Pac12N.
The Pac 12 has a problem that it can't solve itself, and it is on the clock first. It would be ridiculous for the R8 to not exploit that and instead jump to become orphans without an appreciable change in the revenue hierarchy.
We should be talking about whether USC or CU or one of the Arizona schools are going to make it so that the Pac12 doesn't even sign a deal. If they do, I am guessing 5-6 years in which they'll be losing schools by Year 4.
Let's revisit that gap. It likely won't be a gap- it was based on the Pac12 maintaining its schools for the next 11 years, networks being willing to go long on a conference in which a decade of metrics suggest is dying, and shortchanging the Big 12 CFP compared to the other 2 little P5s.