Judging from how Caleb responded to the practices, He was about as good as JF1 in his rookie season. So, I don't see how Caleb will take the Bears into the super bowl.
So for now, the floor is a 7-10 team, and with the strong defense, we can give 2 more games to the Bears; thus, the Bears are a 9-8 team.
However, the Bears have one of the best LBs, DBs, and WRs groups in the NFL. If Caleb can put something good early in the season and carry on to the end, I can see a max of a 12-5 team.