I just don't see much of a path for Trevor to get the starting job back.  If Oz plays well and we win, he probably hangs onto the job for the rest of the year.  If he does bad and we lose, I see Paxton getting the job for the rest of the year to give him another (final?) test so they know whether to keep him next year.

I don't see Brock going postal on anyone, really. He just doesn't seem like the volatile type. And seeing as how grateful he sounded at the start of the season just to be back home with the Broncos and to have job as a backup at minimum salary, I think he knows not to take any of it for granted.  

If they were to manage to get into the playoffs, it would require a big winning streak. The starting QB for that streak wouldn't be benched to bring Trevor back in.