Deck9?!
"Playing cards are an integral part of American and global culture." This line began the proposal of Deck6, seen here.
The proposal lists several similarities between the original four suits, and it crafts one new suit for each color.
However, I thought "why not take it a step further?" and introduced a third color into the mix, while still preserving the values mentioned in the article.
Everyone, say hello to the Astral Deck.
Assessment of the existing suits
All four suits share some commonalities: Symmetrical on a vertical axis, composed of curves and straight lines as a single solid shape, short names composed of common words, and most intriguingly, all suits of a color having nearly-identical bases.
Deck6 also adds a new commonality: both colors have one suit with a single point on top, one suit with two points, and one suit with three points.
Do They Match?
My new color, the Yellow or Gold suits, follow all of these axioms.
They are symmetrical around the vertical axis (and the Cross, like the Diamond from the original set, has an additional horizontal axis of symmetry)
Each Yellow suit has the same bottom, with two points facing away from each other.
The names of the suits are "Arrow", "Cross", and "Star", which are simple yet descriptive monikers.
So I would say they do, in fact, fit in with Jim's additions as well as the original four.
Like its predecessor, most games are playable with no rule modifications.
Not Deck9?
My initial plan for the name was to use the straightforward naming convention established by Jim, but apparently people are actively hating something else called Deck9, so that isn't an option (for now, anyway - if they stop making Life Is Strange games, we might have a chance).
The (hopefully temporary) name is:
...based on the star and its derived symbols.