So with the wait for Destiny 2 I've been kind of bored with things in D1. So after going into Holtz's twitch stream, I realized that something that would be interesting while waiting would be playing a Destiny version of a Trading Card Game. The URL above goes to a reddit post of someone having the same Idea and got started with it 9 months ago but then stopped. So before I start planning my idea for a Destiny (TCG), are there any laws concerning with making a fan project from an pre-existing IP?