Is the beast the same as the darkness?

[Cilia]

I feel like in the future, some quests will make a check to see if you have DRK past 50 (or are actively on DRK), and give different dialog than if you are not. Did it in HW with DRG, so its not an impossibility.

Numerous quests check to see if you've finished X class or job quest. Yugiri compliments you on becoming an accomplished ninja while exposing the Ivy in 2.4 if you're a ninja, Thubyrgeim says you can administer Tataru's ACN entrance exam if you've finished that line, Y'mhitra treats you like an old friend if you've finished the 2.0 SMN quests when you need her help to yank Y'shtola out of the Lifestream, Surito Carito has different dialog in WP HM if you're on SCH, etc. It's not just DRGs in 3.0.

That said, I doubt DRK will ever take center stage like DRG did in 3.0. DRK is very different, flavor-wise, from most other jobs; while they're all neutral at worst, DRK takes us into "necessary evil" territory with the vigilante killings and such. Is it possible for DRK to take center stage and become the focal point of quests? Absolutely. Doesn't seem likely to me though.