Ok, it;s actulaly not much but it;s huge.
reminder, I will be describing the stuff I saw here
http://i.imgur.com/Q8vUThz.jpg
jsut check the link because I am not flooding this thread will all new images, there;s way too much.
So, the main point is the cards system. There's artworks for the normal cards, a level 1 card and a level 2 cards all in on3e card and 2 cards form.
The normal cards can be bought in a shop, according to the map, it;s right next to the lakitu palce where we know it was a bout papercraft. There seems to be A LOT of cards btw.
That shop also allows you to buy lv1 and lv2 ? cards. Btw, the ? cards coudl be found in the overworld.
The amibo thing comes with the ? cards. Basically, you ahve to register the amibo to be able to make cards with it. You use the amibo to create turn a ? card into a character card. Each character has a set, I think there;s 4 last time I heard about it, but it is known that there was sets.
There's also a very cryptic sparkle cards system. How it works is I think you need a second amibo and if scanned and you have the same card on both amibo of a given set, that cards gets a sparkle texture and it is upgraded. My theory on why they do this is to phisically have a friend who has amibo and stuff, but I really think it woudl be a weird system tbh.
it is unclear what lv1 and lv2 are for, but it might be related to the sparkle, it is hard to say, maybe it;s a separate thing. It;s also unclear what does sprakle does.
that and 2 very baddass artwork are what the shots tells me. Btw, I think I get how the amibo card usage goes. In battle, you woudl use a character cards and to use it, you scan the amibo and a card randomly generated from the character set woudl be used. It's unclear when this feature is available in battles. Also, the mario set has 26 cards, we know 20 fo them becuase it;s 19 + the 8bit fireball one.
For paper character specific cards, maybe there will be because that paper mario card is an artwork from SS and jsut to tell you, we don;t know the 2 cards after that one.
Also, the dfirect actualy showed us a lot of yoshi cards set and luigi cards set.
Nothing is known for the peach set.
The amibo for the sets were known,, I don;t recall them. but it was said on that famitsu thing.
So that;s all there is, I honestly really think that battle cards sounds much mroe interesting than i originally thought