New England is the ultimate "system" NFL team. They certainly aren't going to change their system around to accommodate Tebow as a QB if Brady got hurt...Hell, NE's two back up QB's are better than half the starters on every other team now. And Tebow's ego is too huge to not play QB in the NFL...
I think belichick has the balls to just say "You're a tight end or a back now, Timmy boy".
And fans would get behind him. And tebow would be good at that and knock some people down. and once a game, I do think they would play with him tossing an easy pass on a trick play.
But yeah, timmay's ego is pretty big.