I liked those old Iron Man cartoons from the 60s which only had like two frames of animation per episode. Those were great.
Marvel Studios is being smart and using this as a way to make an Avengers film. There's an Ant-Man, Thor and Captain America movie each in the works. This will work as a way for the public to learn who each of the characters are without taking up film time.
I think it's cool they chose Robert Downey Jr., depite his drug riddled past. The guy is a survivor and I admire him for churning out the roles. He can do all the blow he wants for all I care as long as he can still act.