The question is whether Airbus knows it’s a negotiating tactic and won’t budge on its pricing knowing so, or would they anyways?
It could be a negotiating tactic due to the most favored customer clause that AA has with their A321neosviewtopic.php?t=1377333
Airbus was able to win an A321neo order from Delta so the most favored customer clause is not an insurmountable challenge, but the pricing for the A321neo may higher than Spirit wants. It could open the door for the 737 MAX10.
People on this site are quick to it is just a negotiating tactic, but I think Sprirt ordering from Boeing is possible. They have a relationship dating back to the Md80s. The A320neo entry into service has been such a disaster at Spirit that they cancelled A320neos and switched to CEOs. The engine issues, grounded airplanes and delivery delays that exceed a year could have soured the relationship enough that Spirit is willing to buy Boeing. The 797 might be a good option for their high capacity trunk routes to Florida as well as offering enough range to penetrate farther into South America.