Tatsuya Ishii who used to be in Kome Kome Club and Satomi Takasugi will be singing the theme for TDL's 25th anniversary which will be called Mahou no kagi (key of magic) ～ Ｔｈｅ Ｄｒｅａｍ Ｇｏｅｓ Ｏｎ. It goes on sale April 16th (on the 15th in the park)! For all of you that ordered the dvd set it's on there!
It will cost Y1,050 and you can see all the info at the 25th anniversary website. http://www.resort25.jp/news/index.html
The track listing is
1. Mahou no Kagi ~ The Dream Goes On
2. Mahou no Kagi ~ The Dream Goes On (Duet with Tatsuya Ishii version)
3. Mahou no Kagi ~ The Dream Goes On (Duet with Satomi Takasugi version)
4. Mahou no Kagi ~ The Dream Goes On (Instrumental)
5. Mahou no Kagi ~ The Dream Goes On (Image film version)
Edit (again sorry!): I just downloaded a clip of the song to my cell phone and it's really nice! I don't know if it's allowed but I could try to record it off my phone and put up the clip. It's just a part of the song (44 seconds) so I imagine it should be fine but I don't know if there is a rule regarding this..