I trust that Mikael and the guys must have some awesome ideas in mind to even play around with the thought of releasing a double CD. It's true that we don't exactly know, yet, what is meant by "heavy" or "mellow", but I'm a fan of both, and if this were released tomorrow, I'd buy it. I'm thinking, perhaps, it could be that the mellow album will have more clean vocals, and not just be 74 minutes of "Benighted"-type songs. If Mike doesn't like a song, he won't put it on the album, and so far that has worked. They wouldn't have brought up this idea if they didn't have something awesome in mind, so right now I have to say GO FOR IT! But it'd be great to know, also, what exactly is meant by "heavy" and "mellow" - - each song, or just the overall feel of the album? After all, "Morningrise" could even be thought of as a "mellow" album and I think it's great! I'm hoping more info with a more detailed explanation of the plans will be out soon. Either way, I'm eager to see what comes of this idea.