As far as Dane Cook as a potential Captain America, it certainly would have been an interesting choice.
Plus now Chris Evans is Captain America and it’s impossible to consider anyone else.
Then again, Dane Cook was an amateur superhero called The Waffler in Mystery Men, so who knows.
I think we all see Dane Cook as a stand-up and the guy from Employee of the Month and Good Luck Chuck so at that time it definitely would have been hard to imagine him in that more serious role.