MM, my friend, given that any road connection from the airport would have to cross the rush hour traffic in almost the worst way possible,( A-2, going down the center through the businees district....it gives me the shivers)I doubt that taking that route on monday morning is faster than the subway....
I would advice the subway, unless actual time from leaving the airport is nearer 10:45 than 9:00pm. Maybe a some cofee at the airport.
A suggestion could be walking towards the plaza where the subway entrance is and do the following.
- go down to get a subway map
- go up again to the little cafeteria on the plaza and calmly study the way to the hotel for a time while both the roads and the subway clear out from rush hour.