One of his next upcoming films is called Yatterman.. Its based on an Anime from the 70s.. Not sure about it.. The official website is up but it doesn't have much on there except the official logo..
He also directed The Great Yokai War which was released awhile back.. I'm not sure about the DVD status of that one. He also directed another film 'Sukiyaki Western Django' which is said to have some involvement from Quentin Tarantino.. Official site below:
I also know that awhile back he did a movie based on the Yakuza game for the PS2.. I'm really most excited about that project because Miike has made some great Yakuza films in the past..