The one thing I have to say about that Invasion card is that it looks a bit too dark—dark image, dark card. I think if you found a way to make it sort of “pop”, it might stand out better. Like a holographic trim/border. Or maybe not, I dunno, I’m not an expert at card creating.
If you still want to do the trading card thing, maybe you could make the trading card versions all chase cards. Isn’t that what chase cards are all about, being part of the same series but also kind of like their own mini series? The Vincent and Alice set come to mind…
Then again, I really don’t know if my suggestion is any good because I don’t think you can influence how rare a chase card is. You’d end up with a series with as many chase cards as the core series and therefore difficult to complete. (This is where the variant category would have come in handy…)
So I guess you could do a few trading card versions as chase cards, but not every core series card. Either way, the art is pretty great.