Eric Anderson, over at Nerd Chapel, wrote this excellent piece titled “Stop and See the Unseen“. I especially like the way he seamlessly works a conversation between Tony Stark and Dr. Strange into the mix.
Tony had no clue that the threats dealt with by the Sorcerer Supreme even existed. While the Avengers were publicly acknowledged and posted all over social media, popular media, and the news, nobody talked about what Strange and his fellow sorcerers do. Nobody knew that threats from other dimensions were coming; even Thor did not know about the Sanctum Sanctorums or the group that runs them on Earth until Strange invited him to come for a visit.