He's great at harmonies, but Akerfeldt is specifying "people who all have lead singer-type voices." So, let's just hope it's not him. Personally, I think Akerfeldt is too smart to try that. He knows that he's too particular about his music to try and take on Portnoy's ego. I see their interactions as like that one guy at the party that doesn't understand sarcasm. PORTNOY: "Hey dude, we totally have to do something together, brotha!" MIKAEL: "Oh, yes. We must do that." PORTNOY: "Yeah brotha, let's do it! I think that music would be badass!" MIKAEL: "Yes, it would certainly be something." *Portnoy turns his head to look at shiny things because A.D.D., Mikael vanishes* PORTNOY (to himself): "SWEET! I can't wait to make an album with Mikael!" Later, in interviews... MIKAEL: "Yes, we've always wanted to do something together, but it just hasn't worked out yet..." MIKAEL'S SECRETARY: "Hey, Mikael, both you and Mike Portnoy have January 2015 to April 2015 completely free." MIKAEL: "NO! I, uh...I have plans. Vacation. I'm going to a sunny beach. Alone."