This was an encounter with a reporter NPC, back in 2011:

Petyr Winsome: Why hello there adventurers, My name is Petyr Winsome, reporter for the Harbor Herald.

Petyr Winsome: Say have you heard the rumors about some beastmen tribe attempting to ally themself with the Empire?

Uni Neko: not really, but considering how the empire feels about beastmen, I don't see an alliance happening

Petyr Winsome: It does seem unlikely, and the rumors were unsubstantiated. But from what I have heard it was some sort of really big Beastmen.

Uni Neko: Amal'jaa? I'm sure they're on the empire's genocide list

Jaison Aurelio: I wonder if it's the Ixali! Isn't Garuda their primal?

Petyr Winsome: I do not think it was them, was some tribe I have not heard of, all I heard was that they were very big.

Uni Neko: like trolls?

Petyr Winsome: Perhaps. The only other part of the rumor said that they had an icy demeanor.

Uni Neko: I've met my share of trolls over the year, though they tend to be more obnoxious jerks than "icy"

Petyr Winsome: Then again this all could just be bunk, made by the mind of someone who spent a little too much time rummaging around underground.

Uni Neko: maybe, there sometimes is truth in rumours though

Jaison Aurelio: I wonder where this beastman tribe could be found?

Petyr Winsome: Yes, there is usually some grain of truth somewhere in a rumor. Only time would tell though.

Nyeik Knight: Great, so now we wait.

Petyr Winsome: The report I saw with the rumor said something about "up north" somewhere.

Petyr Winsome: No real specific location was mentioned unfortunately.

Jaison Aurelio: I wonder if we adventurers can travel there at the moment?

Uni Neko: must be pretty cold up north

Jaison Aurelio: I want to confront these icy beastmen!

Taylor Tots: and negotiate with my fine tip sword to their throats!

Petyr Winsome: I wonder that myself honestly. But I think I'll leave first contact to you strong adventurers.

Petyr Winsome: A bit too old to be wandering about in dangerous territory now.

Jaison Aurelio: I wonder if these icy beastmen call upon Shiva as their primal!

Petyr Winsome: I think that would make sense, certainly more so than having it be Ifrit. I do believe that one would get cold up there.

Petyr Winsome: Well I must be off now to get these notes to my editor. You have been a great help. Thank you kindly.
While it is true that dragons are effectively immortal and tend to hold grudges, the Battle of Silver Tear Skies ended largely in a stalemate, with no clear representation of either side being enemies of the other- rather, the Garleans were investigating the region's concentrated aether, and were effectively attacked for trespassing.

Fast forward to 3.0- Garleans just got walloped by the Eorzean alliance, and are losing their foothold in the region. The Dragons played their best card by attacking Ishgard head-on, with the help of their new found access to Primal Shiva- And were also effectively trounced.

"The enemy of my enemy is my friend"... I believe that based on the state of affairs across Aldenard, and the quotes listed above, that we may be soon running into a powerful alliance between these former rivals. Especially since these "unsubstantiated" rumors appear to be entirely factual, at least so far.

Thoughts?