N148AN was delivered XFW-BGR-DFW today. It's the 47th A321 for pmAA, and the 169th for the combined pmAA/pmUS. We can expect to see at least 3 more 757s sent to the desert by the end of 2015 as A321 deliveries continue.
A321s will continue to replace any remaining domestic 757 flying in early 2016. However, once the 8 ex-HP 757s leave the fleet, pmAA 757s will be needed to cover PHX-HNL/KOA/LIH/OGG. So we should see a brief pause in pmAA 757 retirements sometime in 2016.