The side project if I am not mistaken is the one with Mike Portnoy and Steve Wilson.
Chalky sure knows his shit. He's better at crazy pitching and shrieks than classic growls though.
What do you think Blakkheim ?
Well I've been thinking of Johan Hegg the vocalist from Amon Amarth. His vocals can be really brutal and suits Bloodbath quite well but I dont think it will be him.