I hope they add the wyvern. We have a black mage (nuking job), white mage (healing job), Pld (tank), War (backup tank/DD), Bard (possibly debuffing, maybe also buffing) and then we have 2 full DDs, Drg and Mnk. What better way to separate these two than having a wyvern for Drg?

Drg in FFXI borrows abilities and AF from the classical dragoon, so if the dragoon job doesn't get a wyvern then it's still getting abilities like jump which dragoon had in FFXI. So adding a lancer job with a wyvern as a class in the future wouldn't be the same, sadly it's a one way road.