You might wanna check this game out:

Perhaps you can draw some kind of inspiration from it.

Ironmaggot beat me to it. Tabletop Simulator is a deceptively simple concept but could probably really catch on.

Basically it's a sandbox program that simulates a table, cards, and tokens with physics. The players abide by their own rules, so it's like playing a table game in real life. There is already support to import custom decks for your own games.

I just want to make the project and who knows one day pitch it if it gets enough positive feedback once its in playable fashion.

That wouldn't spare you from a cease and desist. It is not a question of whether you are turning up a profit with a shippable game, it is that you are using their brand, their company's image, for your own gain. They have not approved of this treatment, and it could do harm to their company's outlook. Imagine they have a "we'll never do a TCG ever" policy, and somebody stumbles across this post. They will get confused, because they don't necessarily know you're not with DC.

In other words, you should seriously consider swapping out all art assets asap.

(FYI: I'm not with DC).