Kirk Cousins has played extremely well during his last seven games completing 69.8 percent of his passes, throwing for 1,823 yards, averaging 8.1 yards per attempt and tossing 16 TD passes with just two interceptions during this span. 
The Bears' defense has regressed. Their secondary isn't nearly as good as it was earlier in the season. 
Meanwhile the Bears' offense has looked good the past two games since Mitchell Trubisky came back. David Montgomery is playing his finest ball averaging 7.4 yards a carry during his last three games. Trubisky has Montgomery to rely on and an underrated receiving corps headed by the superb Allen Robinson. The Vikings have given up 26 TD passes, fifth-most in the NFL, and they have the eighth fewest sacks. So Trubisky should have continued success.  
Playing indoors on carpet should just enhance these two hot offenses.