Found this so called "leak" on gamefaqs

[Kiyashi]

Isn't it already confirmed that the expansion will be 2 jobs instead of 3 since the time it takes to do 3 and balance them would take much longer than the 2 years between heavensward and stormblood? Thought we already got confirmation on this.

[StarRosie]

Isn't it already confirmed that the expansion will be 2 jobs instead of 3 since the time it takes to do 3 and balance them would take much longer than the 2 years between heavensward and stormblood? Thought we already got confirmation on this.

Apparently Yoshi or someone has said they are gonna do 3 jobs now since Stormblood is ahead of schedule, yet whenever I ask someone to provide a citation to this claim they suddenly go quiet. So maybe there are gonna be 3 jobs now, maybe it is still only 2. I really wish we could get some clarification on this, which we may get this Friday since, ya know, Tokyo Fan Fest.

[AlphaFox]

Apparently Yoshi or someone has said they are gonna do 3 jobs now since Stormblood is ahead of schedule, yet whenever I ask someone to provide a citation to this claim they suddenly go quiet. So maybe there are gonna be 3 jobs now, maybe it is still only 2. I really wish we could get some clarification on this, which we may get this Friday since, ya know, Tokyo Fan Fest.

Agreeing with Stormfur, the only confirmation I saw was them not doing another mid expansion job. So 3 is still possible per expansion release but I've yet to see any clear info on never doing 3 again.