Originally Posted by KRIM
There's no need. Kevin's getting up there in age, though not nearly as old as Glenn Ford was when he played it (7 year difference). This is semi-recent pic of Kevin:
That's old enough.
They could grey him up much more. Snyder did that with all the Minutemen survivors in the present of Watchmen.
Pa Kent is generally grandfather age around the time Superman begins.
It's been that way in all the comics (except Birthright due to the Smallville TV series tie-in) and even in The Animated Series and all the Animated movies.... and the serials, and the Reeves series.