The official website is now updated to show the title: Super Street Fighter IV Arcade Edition Ver. 2012. During a panel at EVO, producer Yoshinoro Ono said that the new game would be location tested in Japan this summer. Later, in a tweet, he confirmed that "Version 2012" refers just to the updated game and not an entirely new one. So right now it doesn't seem like you'll have to buy SF4 again.