Here is what we hope for
Weeks 1-4: Defense carries the offense and offense gets this shit out of their system
Weeks 5-8: Defense continues to be elite, Offense is consistent and average
Weeks 8-11: Defense continues to be elite, Offense becomes above average
Weeks 12-16: Defense is elite, but no longer needs to be, Offense is consistently a threat
That would be an ideal progression for this season and how the Bears can be playing real football in December.
This is highly optimistic. A more reasonable timeline would look like:
Season 1: defense carries the offense and offense gets all the shit out of the system
Season 2: defense continues to be elite and offense is consistent but average
Season 3: defense begins to falter due to wear and tear and offense is still average
Season 4: defense is on the decline and offense is the top 10 in output in the league
Summary: team's window closes very quickly due to lack of a QB to accompany an elite defense (typical Chicago Bears)
Trubisky would have to play another 2-3 seasons to see as much football as guys like Watson and Mahomes did due to college. It's so much more challenging to learn how to be a QB at the NFL level. Trubisky lacks the foundation that most QBs entering the league have by playing a lot in college. NCAA isn't the NFL, but snaps build confidence (success at the NCAA level helps too) and that foundation both in terms of snaps and success are big glaring holes that Trubisky had entering the NFL.