This thread is an exercise in futility as far as the chances of Witten returning. He has a new gig that appears to be going well. Let's not waste time and mental energy contemplating that which, by all indications, isn't at all likely to happen. I'd be willing to waste a few minutes of my time at this point to state the obvious. In serving that cause, here goes:
I wouldn't bring Witten back as a player, even if the opportunity presented itself. If it were eventually possible for him to return as a TE coach, that would be another story for another time. As far as him coming back as a player, that boat has already sailed. It's simply not worth considering at this point in time. He's older and out of shape now. Other players need to come into the picture and be allowed to develop.