Game mash Up Idea

Thanks again. I would like to add multiple dice roles and also timers. It would be a great game. I have so many ideas going on right now i don’t when i am going to finish with one. Also i have a question about the IP and using theme from the other games and artwork. when i think about dota map, and characters am i copying something? is it like if i publish these games i would be sued for publishing such a game. what can i say everything is already out there. i can think of collaboration and contact the world of war craft makers and beg them to let me make this game, buy why would they come to me they already have inhouse game designers or they might be knowing plenty. its a tough choice. even if its a film like a thought of matrix theme. Matrix board game theme and components i did not post the details but i think i have a good concept i am waiting to make the components, even if i succeed in making a world class game like chess for matrix move, i cant publish it because i am making use of characters names and they persona matches with the movie to add a story to it. So Yann what is your take on IP and using stories for your game which may get me into trouble. Thanks again.