Silver Surfer, like the FF, isn't currently owned by Marvel/Marvel Studios. so that ain't happening.
Why would anyone want to put Captain America in a Silver Surfer movie?
Cap couldn't beat The Punisher, who is human, in the comics most of the time, so why put him against either the Surfer or anyone that can callenge the Surfer?
It was a joke based on the actor... The second part of the post was the serious bit.
Just my opinion, but Captain America sucks. Boring character who only deserved one movie. It's like with Mystique and the X-Men movies.