Startup Idea : Fifa trading card game

Exchange player cards via Facebook or win new cards from winning against people online. Each card has stats like dribbeling, attack, defence,... The battle system is turn based. Each player puts the cards from their deck on the field ( The field is a grid where you and the opponent can place cards). A card can have the ball at a certain moment and can give it to another card each turn. The opponent can send a midfielder or defender on the card with the ball. An algorithm can then decide who gets the ball based on luck and the stats from the card. I really haven't figured it out completely but i'm open for better ideas