I am pretty sure YoshiP said it'll be a job new to Final Fantasy, Runefencer is in XI and Templar is in tactics.

But I am on board for some of the "Reaper" predictions, this has the strongest hints thus far. Although we have a scythe wielding aesthetic in other titles, like FFXI's DRK but nothing that fulfills a reaping job fantasy - FFXI DRK has cues. it'd be appropriate for the themes of the expansion and for Zenos to pick up (I reckon that's gonna be the next part of the trailer), maybe it's Zenos who gets the upgrade. And going by the FFXI comparison, the version of DRK we've got I think if in how its designed to play is probably closer to FFXI Runefencer, a greatsword wielding & self enhancing tank who uses magic shields. Though Runefencer was elemental rather than dark magic. DRK was more of a scythe wielding (though it could use greatswords) glass cannon that'd sacrifice defense and health for power and then a dark magic focus. Its scythe weapon skills played to a reaping aesthetic and there was a use of various drain spells, and I wonder if they'll take those cues instead and make a new job out of it. Maybe something that drains the life force of its enemies to get stronger - so maybe certain attacks could trigger buffs with that theme. Of course, pure speculation.