No it appears we are actually going to put 186 on the new A320's and 230 on the 321's. Multiple articles cite it as fact now. These may be the new high-density variant of both models. The max seating on the high-density 320/321 is 189 and 240. Airbus offers added seating capacity for the A320 Family while retaining modern comfort standards*| Airbus Press release

"The new aircraft will also feature Frontier's slim-line seats, the widest economy seats in the U.S. domestic airline industry. The A320s will be fitted with 186 seats, and the A321s will be fitted with 230 seats." - See more at: FRONTIER AIRLINES ANNOUNCES ORDER FOR NEW AIRCRAFT