So Adam on twitter has posted this image: https://pbs.twimg.com/media/DMXjzKNVoAAp5nW.jpg:large
It shows the amount of unique arts per deck, so there's things alluded in it, for example, you can see that the Aeon Men deck has only 4 unique arts in it.
SPIDER BOTS
Out of all the notes, this one stood out the msot.
If the Hero deck card count does not include the character cards then many of these decks have more unique card art than all of the currently existing hero decks. I think the current highest is 20 (Chrono Ranger and Argent Adept). If the count includes Character card's front and back art then the highest is 22. Either way Benchmark is way higher than any existing deck.
Whilst I'm not adam and can therefore, not be sure for definite, I think the post it under the comic arts is for the scion deck (no mention of it elsewhere), and it looks like akash and luminary are the only heroes to play targets (HP overlays)
I found it interesting that at the bottom of that list (which looks like art for the video game heroes), all of the FV heroes are done except for Wraith. So, either she's last of that set (which, if released in December, might make sense), or a sticky note fell off.
I like how the comic is listed as "Unknown Arts"
I'm glad this image is bigger, the twitter version was too small for me to make anything out.
I find it interesting that "The Abyss Stares Back" is a seperate art. I think I remeber that as a card in Oblivaeon's deck, so I'm guessing now it is a card that goes into play like the shields, which makes things interesting if we consider each form is going to have a unique set of cards that come into play with it.
I had two guesses there: either it will be an art print, so needs to be done at larger size, or else it needed revising.
Interesting to look at which heroes have many/few unique cards.
Can anyone translate the middle of the sixth row? Best I can read is "The Harpy's applied numerology jpg" and that makes no sense to me.
You read it right.
I think the pink cards are for art that needs a different format for art prints etc.
The Abyss Stares Back, Applied Numerology Mental Medicine and Faultless are in pink, along with the PA pin art.
The faultless pink note says "Faultless insets front & back" which I think are the little bars on the Scion character cards where the HP is, would that get a full print, or am I overthinking?
Spite name logo for gloom weaver? What does that mean?
Foil art for Spite: Agent of Gloom? (or something similar?)
Maybe the logo for the divider cards?
In the Oversized Villain card pack (with the new art), the Spite promo is called "Spite: Agent of Chaos" instead of "Agent of Gloom."
Probably correcting that for the foil pack.
https://i.imgur.com/lRo7vXa.jpg is the current Agent of Chaos Logo, which I suspect is the art in question. On another note, I've realised that decks with more than 20 arts are required to have at least one unique card ,in fact they must have (X-20)*2 unique cards, where X is the number of arts for that deck (and that's given that all the other arts appear exactly twice each). Given that "New hero character cards" is it's own post-it, you can likely say they aren't included in the deck counts, so it looks like Benchmark has at least 12 unique cards! (of course, that includes the assumption that there's only 40 cards in his deck...)
Ok so, if there are only cards of which there are 1 or 2 copies, then there must be exactly 12 unique cards and 14 duoque cards (121 & 142).
If there's the option of 3 copies of a card then here's a table:
W is number of unique cards, X is number of duoque cards and Z is the number of trioque cards.
W |X | Y
13|12|1
14|10|2
15|08|3
16|06|4
17|04|5
18|02|6
19|00|7
Adding in the possibility of 4 of a kind (a quartique, if you will) means generating multiple tables, one for each value of Z, the number of quartiques:
Z=1
W |X | Y
15|09|0
16|07|1
17|05|2
18|03|3
19|01|4
Z=2
W |X | Y
16|08|0
17|06|1
18|04|2
19|02|3
20|00|4
Z=3
W |X | Y
18|05|0
19|03|1
20|01|2
Z=4
W |X | Y
20|02|0
21|00|1
(If Z>5 X or Y must be negative to compensate and you can't ship negative cards)
Boy this was more work than I should've given it 
EDIT: Oh hey it was all for naught, the count includes some character cards so the actual count comes down to 9 unique, 10 duos, 1 trio and 2 quartets from here: https://twitter.com/GTGChristopher/status/922610361353809920