I really dont see that happening for a couple reasons.
1. SAS loves the spotlight and the bragging rights being on ESPN offers. If he took the job at fs1 it would be a major downgrade reach wise. I argue he loves the position and power ESPN/Disney gives him more than the money. He's gone on record saying he willingly took a paycut when they were going thru those job cuts.
2. The connection to Disney is what SAS covets, the power that offers. SAS feels he is on the tailend of his sport talking head career.
He said he is grooming Shannon to take his spot on First Take. He desperately wants to be a host on one of the late night shows and transition away from first take, disney is his pipeline to that. He even said he worked it in his contract for him to host it once or twice. That's how he ended up filling in for Kimmel or w/e. This is on top of him trying to get a deal with McAfee by ESPN licensing his SAS show or w/e. This is why he is going hard on his youtube show and trying to push that.
3. Other than the 100M contract, he already has all the power on first take. He has said countless times that no one gets on First Take w/o his say so. Maybe they can try to offer some spots with fox proper to try and sweeten the deal, but doubt they do.
Edit: I was looking for when he hosted the Late night show, was trying to see what year that was and ran across this article. This is from this year btw
The sports commentator could make a career pivot in the near future.
www.si.com
2021 when he hosted the kimmel show
The late night show play is why he is doing all this tap dancing shyt.