Originally Posted by Rock Sexton
After capturing Loki, Cap even remarks to Iron Man "that guy is a friendly?" when Thor shows up to snag his brother. So obviously Cap had previous knowledge of Thor.
Then there was also the "I've seen the footage" line he gave Stark on the hellicarrier as they were ready to throw down.
yeah this. Cap was prepared
Though Stark approached it nonchalantly, and banner just didn't seem to give a ****