Are you all idiots? The card system was AWESOME, as well as an ingenius battle system, which as far as I know had never been thought of before. It added depth and strategy to an otherwise boring style of gameplay. (Trust me, KH1 gameplay for CoM would have been 20 times worse). At least the card system added flare. If you all hate it so much then why did you even play CoM? Because you love KH? Because you wanted to know the story? Any true fan of the KH franchise would be glad we're getting the games at all. Nomura doesn't HAVE to make them. And if you think you can do the game better, then by all means, just try to make a series of games with amazing sales and deep, fresh, material and battle systems and ideas that keep the fans wanting more.
/rant over.
And also the battle system is still being made, there's still plenty of time for changes. Also Nomu stated that the system could end up feeling more like KH2 then CoM...so why all the complaining about cards?