1) Not going there
2) LOL. Hill will have a shot to compete for the job, that's all he's ever been promised, and that's all it is. He is not the "presumptive next starting QB". There's absolutely zero chance they go into next season with Taysom and a couple of journeyman types. It'll be Taysom and either a draft pick, a reclamation project (Mariota type), or a vet (Andy Dalton type). He is going to have to win the job against legitimate competition.
3) There's not a great comparison for a QB, though there are players at other positions with similar arcs. Our very own Drew Brees had a "pretty good" start to his career (much like Teddy did), suffered a severe injury (much like Teddy did), and we all know the rest of the story. The difference being that Drew never had to go take a backup role anywhere (though interest was reported to be limited to us and one other team).
4) I don't think so. For as great as Brady is, he's arrogant to the point of delusion. He thinks he is a medical genius because he tells people drinking lots of water will cure cancer or whatever. He's a bimbo. He wants to prove that he can do it without Belicheck.