Bringing him back or not probably depends a lot on Wentz's recovery and who they might like to carry as the #3.
I wish Foles had made 15 starts this year like Keenum so we could compare them. I mean, obviously I don't wish that, but you can't really call Keenum a back-up at this point. He even started more than half of of the Rams' games last year, whereas Foles has not seen regular action since 2015. Reps matter as much as raw talent and there's nobody - not Foles, not Sudfield, not Kaepernick - who can bring that to the Eagles now alas.