If the Earth's orbit around the sun got a little wider and days turned to 48hrs it would seem possible, but he couldn't possibly have the time for Opeth when he's already got so much going right now.
Haha, I love how are totally aware of and totally not afraid to admit your pop edge. So many musicians are just so serious and refuse to accept their music has poppiness to it!
I dunno... Dan is a songwriter, and so is Mike. there are similarities in what they do, but for a "main band" like that, i am sure some head butting would go on!
I seem to remember reading that Dan wrote the 'Sunbirds leave their dark recesses...' bit in Opeth's 'Black Rose Immortal' (possibly my favourite part of my all time favourite song). I don't know how they'd go together being 50-50% 'co-writers', but I'd sure like to hear it!