And looks like the the same ones from the Comiket/25th anniversary celebrations.
Found out here: http://operationrainfall.com/2016/01/06/fire-emblem-fates-gamestop-pre-order-bonus-revealed/
They're throwing in Azura/Lobsterman/Xander pins for people who pre-order.
Hoping they might reveal later on that all pre-orders get Lobster for Birthright, Xander of Nohr, and Azura/all three for the LE. Either way it's not a huge deal.