If it's just a poem on how HW is ending and SB is coming, then it's fairly redundant. We know that. Everyone knows that. But these poems have always had hints about future things. I don't see why they would break the mold now and state "Oh yeah, Heavensward is ending, Stormblood is coming, please look forward to it", when that's been known for a very long time now.

There must be something else here.