These are the translated Heavensward Trailer lyrics

Beneath the gazing stars...
Vales deep and forest dark...
Betrayed by loyal hands,
our wrath stir.
Bound fast unto our fate...
One path, one burden great...
Yet ever do our aching souls point Heavensward!
And ever rings out our song...

Dragon part (Dragon / English)
Dis an sô / Our slumber disturbed
Rus at hi / My brothers wake
Sal'jas afarr'a / Vengeance will be ours
Ma mor nâ, Eorzea! / The saviors must perish!

I always thought that the early Ishgardians had a deal/ "covenant" with the Dravanian Dragons in some way that was broken by the Ishagardians 1000 years ago. Wasn't it said that Coerthas was originally Dravanian territory?

Eitherway, the Dravanian Wyrmmking called out and it seems to be a VERY big deal to the point that even Midgardsomnr was (originally) compelled to join in.