As something added specifically to DRG, I don't see them doing this... but they've mentioned in the past the possibility of having Companions we can summon other than our chocobo. I would love to be able to call Kal Mhyk or Orn Khai to fight alongside me in open world content, or possibly other NPCs we've come to know through our quests. We'd probably need something other than ghysahl greens for those companions though...