Screencapped stuff from FE Cipher livestream earlier...
https://imgur.com/a/JOv2A
Japanese translations per Kuroneko's catalog of pictures:
The first four images list off some of the "many famous/popular illustrators that will be contributing their art" to the game.
The cards are "Original design/concepts" for the characters. The one on the left is "Pegasus Knight class Minerva", and the right is "Hero class Leaf"
It's interesting to see the whole piece of art before the card overlay.
"Rules of Play:
-Decks are made up of 50 of your favorite cards
-You can decide on only on 'Protagonist' or 'Main character' for your deck. (It's unclear if this has to be a Lord class character based on this picture alone)
-Each player takes turns placing characters on the battlefield and attacking the other player.
-You win by defeating the other player's Main Character.
"Rules of Play - Playmat details:
(Going from left to right starting from the top, the names of the areas on the play mat are as follows)
'Orb Area'
'The Battlefield', which consists of the upper 'Front Lines/Vanguard' and lower 'Rear-guard'
Below the Battlefield is the 'Support Bonds Area' (where you'll work on the support levels of characters)
The column to the right of the battlefield is as follows:
'Support Soldier Area' (I'm guessing where you will place current teamed up soldiers)
'Deck placement'
'Retreated Soldiers Area' (I'm pretty sure this is supposed to be the discard pile, it uses 退避 which means to evacuate from battle)
That's all I can get to before I get ready for work, apologies for some rough translation, but I was curious about the game mechanics myself and thought to post what little I gleaned here.