Loki was just okay to me. Too whiny and had zero physical presence. And the only reason he lasted so long is because his brother could not bear to see him killed. Compared to the Joker, Bain, Rha's a Gul, Magneto, Sebasian Shaw the chief villians in IronMan/Advengers seem out classed. I just don't see how a robot would make an engaging villian in such a huge movie.Why not use Galactus/Silver Surfer as villians for Avengers2?