Carr is for sure getting traded. Doesn't matter if he does good or not, he wont play for the Raiders next season. If a team offers the Raiders a trade they can't refuse, I could see him gone by the 30th if not then he'll be gone in the off season. Gruden spent his entire broadcasting career talking himself up as a qb expert, he won't pass up the chance to show everyone that he is indeed the man with the golden touch.
I don't think they will trade him to the Broncos, I think Keenum is doing good for them. Most likely place is probably Jacksonville, since they really need to get rid of Bortles. Giants could use a QB to replace Eli, that would really be a really dangerous combo with Carr throwing bombs to OBJ. Trubisky really looks bad now but the Bears are all in on him. Maybe the Dolphins?