Agent Phil Coulson took pride in his complete set of Captain America trading cards. It took him years to collect and now that Steve Rogers has been woken from the ice, he was hoping to get them signed. As Coulson loved to tout "They're vintage and near mint."Nick Fury uses the blood stained cards to give the Avengers "a little push" to assemble.
These replica Captain America trading cards from The Avengers are pretty sweet. They even have the blood stains from when Coulson dies. Yeah that is a little creepy.