Do you get the feeling he's making these guest appearances in the hope of finding the next Paul Rodgers?...
Maybe he's just having fun playing with people. Either way, I'm not a Muse fan in the slightest.
On a Matt Bellamy related note though, I would like to see Brian do a covers album and one of the tracks to be Telstar.
Perhaps at the next glastonbury Brian and Roger along with Paul could play a set of Queen songs along with some of free/bad company songs like they did on their last tour
Probably very unlikely to happen though