In a first for the series, Infinity allows players to customize and set up to four different "Sortie Settings," which include the aircraft, special weapons, skills, and emblem that the player will be flying with during that sortie. It is currently unclear as to whether these will apply to single-player as well as multiplayer, or if they can be selected while respawning in multiplayer (if respawning is possible).
http://acecombat.wikia.coa.com/wiki/Ace_Combat_Infinity
Bonne nouvelle 