Re: Who should play Thanos?
My own vote would go to The Hellboy himself, Ron Perlman. Others may disagree, but Thanos is likely to be cgi/motion capture. The age of the actor or his pure physical presence won't be of as much importance as his facial and vocal presence. I think the cold and low tones Perlman did in his part for AFRO SAMURAI would fit the death courting mad titan very well.