You’d think reports of his release would have been accompanied by rumors of his return, however. This has always been a possibility. Belichick is loathe to keep 3 QBs. Especially if he thinks the younger QB has as good a chance to keep the ship right if Brady should go down.
This is the day that “In Bill I Trust” rings truest to me. You will disagree with this but Belichick has peers and perhaps superiors when it comes to acquiring players, but he has no peers whatsoever when it comes to knowing what players to keep or how to use them.