Short and simple, but dragons! 
Unearthed Prophecy Expansion - Theme Guessing
Really cool ones 
Rebirth support, for realz.
Vespyrs, Backstab support (teleport general?), defense against spells for more factions than Lyonar.
General transformations, like Magmar’s 10/10 card, for each faction.
Really cool ones would do.
I like board shenanigans, for example a minion with phasing: pops in and out of existence and when it vanishes you determine where it will phase back in again (without summoning sickness), if the spot stays unoccupied it comes back otherwise it’s destroyed and deals 5 damage to the minion/general in that spot.
Pretty much it. Finally cementing the unique keywords, mechanics and themes of ALL factions. Its been a long time coming.
Really intrigued, will there be new keyword like Propechy?
When Prophet minion enters play, choose a target minion.
If target minion dies your opponent’s turn, then X.
Or, simpler, if this minion dies during opponent’s turn, then X.
I bet Prophecy is something related to decks / card draw. Something like “you can check the top 3 cards of your deck and something” or a mechanic like Discover in HS, where you get a number of random cards and you can pick one. I always liked that mechanic and I think it fits the Prophecy theme.
Cards interacting with deck/hand.
Im gonna guess its gonna have heavy spell synergy
Oh damn I really hope not… RIP Duelyst… I hate deck manipulation T_T
Hopefully a positioning thingy
I actually quite like the excavation and discover mechanics as it adds a bit more consistency! But there needs to be drawbacks I.e how pot of duality does it.
Dragons are anything but short and simple 
I am completely fine without a new keyword, I want them to explore the faction keywords , because you can make some interesting effects with them , even with something really simple like Zeal.
I hope its about revisiting vespyrs and dervishs, and creating ones for each faction that don’t already have one.
More vespyrs
More wraithlings
More dervishes
More shadow creep
More backstab
More deathwatch
More zeal
More wraithlings
More eggs
More shadow creep
did i mention more shadow creep?
All I want is Vaafu skin on the actual game.
You did actually, right here
Lemme pull up that reference for ya
There it is, dw m8, I gotcha
More healing for ziran
More kaleos synergy - backstab and move.
And most importent - more infiltrate and vespyr synergy!!
Unearthing makes me think of Discovering or drawing cards. Prophecy reminds me of the Prophecy keyword from The Elder Scrolls: Legends, which also brings to mind the Echo, Fate, and Destiny effects from Eternal Card Game. I think we are getting a new keyword, as well as some new synergy for the archetypes mentioned above.