I don't know how old you are or if you even read comics or how much you know about movies but the canons have changed a lot in the past 50 years.
If you don't believe me just look at Neal Adams' Batman and compare it to today's renditions.
You've heard about Neal right?
As I said, the ideal body type never ceased to evolve.
Even body builders look different.
Chris Reeve was a built guy, Cavill is bigger, different times different audience.
And as I said, the "ideal" body type can be whatever you consider to be ideal.