I think Foles will become available, however.
He just had a phenomenal postseason and there are more than a handful of teams who'd be interested in acquiring him once he becomes available.
I told my buddy Professor several weeks ago, when Wentz went down, that Foles had an opportunity to find himself a starting job in the league once again. It seems he took full advantage of that opportunity. At least to me, anyway.
If a 2nd-year head coach in the NFL, who was coaching HS football less than 10 years ago, has the smarts to adjust his play-calling to better accommodate the strengths of his QB to fit the offense - then maybe it's not necessarily a question of who should be taking the snaps, but who should be calling the plays on offense.
See Andy Reid as example numero uno.