I'm guessing you're looking at high level roulette, every ??? is a dungeon you have yet to do. http://ffxiv.consolegameswiki.com/wiki/Duty_Roulette take a look at that and scroll down to high level and you'll see each dungeon you need to unlock the roulette.

They've added a lot of dungeons to high level in the past few patches so that's probably why you've never seen it before.