Well it looks like Johnny's has decided to do the smart thing and will be releasing a new single for Kanjani8 on June 30th, which works well as NEWS can't really do anything with Yamapi busy filming for a movie. The single is for the Wonderful World!! song that is being used for one of their current variety shows.
The single will have three additions, two LEs and a RE. The RE will have two tracks that will be on all three additions of the single as well as "PUZZLE" Remixes of the songs Wa Ha Ha and Rolling Coaster and the karaoke tracks for the first two tracks. The A type version of the LE will have the PV for the title track and the B type has what is listed as Prologue of Bachi #1-4 on the DVDs each come with.
The singles are up on cdjapan for pre-order but the listings don't have the usual track information for some reason, though it is up on Johnny's net.