Ok, I figured it out! The one think the card could spoil....
But first I am gonna bore you with all it can't be

Stan won't be deleted. Even if for some reason EvaKiss has no idea what to do with him in the future that is no reason to remove him from the game. It is much less work just to ignore him, just here and there a few lines of him passing by. Also he always has a place as Lena's photographer/camara man. (I have no doubt that he'll be running Lena's Stalkfap in no time.)
His stats can't really be a problem. He can't possibly have low wits, he works for a living. A wits of 10 would surely be surprising, but no spoiler. A high charisma would be a big surprise, true, but how could that ever make any sense? Same for high athletics. And finally lust doesn't really have any meaning so it could be everything.
His name is known.
Also the card has the number 14 right after Ivy and Louise and before Axel and Seymour, right where it should be. So his ommision wasn't planned but came up while writing chapter9.
So that leaves only one information on that card.
His