They'll likely be revealed a little closer to launch
You can also make Jenova itself into a game-winning threat by equipping/buffing it, where it just does an Innkeeper's Talent impression rather than sac and draw sequences
for example, your options for the type line are limited to actual type combinations weve seen in game, but you can enter custom text for the super- and sub-types
That sets you up to steadily amass lore, and be rewarded with cards if an opponent tries to stop you by taking Mad Hatter, Gracious Host out of the picture
One of the better Legendary cards, Emerald gets some additional ramp with Webby, while also tackling the issue of going second in a game
As far as Donald Duck cards go, it is also one of the more valuable