The "return of Christ" has also been treated like a Sudoku puzzle rather than some organic development in the relationship of God to man according to New Testament promises. This is guaranteed to be wrong, smear the reputation of Christ, and subvert the goodness of God in Christians.
Personally I wouldn't be surprised if the return event is something like a celestial body careening into the earth, sending all souls to the hereafter quickly. But that's as far as I dare to try to foresee, and that tentatively. The return event shouldn't excuse misbehavior, that is sure.