Heres an idea add legend quests. So basically when you unlock a legend you would get quests for that legend. If you do those quests you would get a skin and a intro quip. For example mirages could be...
@Roryisdagoat Actually a good idea. They even have a few quests lying about, they don't use for anything. Something new players never got to play, from back when events had solo or multiplayer quests.