The whole situation regarding those people seems to be really complicated, after looking through this blog post:
http://minakata200.blog85.fc2.com/blog-entry-59.html
Unless somebody is ever able to explain the situation regarding Akiragumi, MUSE and DOORS, right now it looks like PANDA could have been associated with them all along. At least until the huge "conflict"(?) between MUSE and F&C. And Hironari Tadokoro was involved somewhere as well!
I added more doors music entertainment members as well.
Also yeah, Doors is still kicking. They are working for DIVA now. Next CD ->
http://vgmdb.net/album/16813. 4 vocal songs and 23 BGM tracks