Should Opeth release a B-sides album?

I say Agalloch, Opeth, Porcupine Tree, Dream Theater, and Novembers Doom should form a mega band and play.

well there was talk a few years ago about mike, steve wilson and mike portney doing a project together but all their schedules were to busy to do it at the time
 
I'd like a cover-album with covers of Mikaels favourite bands/songs. some jazz and stuff. would be awesome.
something like garage inc. .. but actually not sucking.