Thanks to the Avex Rider Sound website, we know have more details on the music of Kamen Rider Wizard!

Title: Life is SHOW TIME
Artist: Kiriyun Shou (vocalist of Golden Bomber)
CD Release Date: 10.17.2012

The CD will also come with a music video for the song, as has become customary since about Kamen Rider Decade’s run with GACKT’s Journey Through the Decade. If you’ve not heard what the singer sounds like, I suggest you go check out some of Golden Bomber’s stuff. He’s…an interesting choice, I think the visual kei look he rocks sorta blends with the theme of Kamen Rider Wizard at least.

source: http://mv.avex.jp/rider_sound/index.php