Before the Avengers and even before Firefly, there was Buffy The Vampire Slayer and Angel. Two great shows created by Joss Whedon that still hold a very strong cult following. That’s why it might not be too big a surprise that he snuck in a little easter egg as a nod to his old shows in The Avengers: Age of Ultron.

Here’s what he had to say about easter eggs in genera:
Yeah, there aren’t a ton of Easter eggs. It’s so hard for me to make a movie, especially this movie, I don’t spend a lot of time going, “You know what else would be hilarious?!” I’m more like, “Was the gun in the frame? Oh my God, I’m so tired.” I mean I would leave set every day and go home and write because it wasn’t quite right; it wasn’t quite finished. It needed to be better. So not a ton.

That said, he snuck one in during Thor’s vision of Asgard. If you blink, you’ll miss it. We did. Just look at the three figures between the columns. They bare the skulls of A Wolf, A Ram, and A Hart in a direct nod to the evil law firm from Angel, Wolfram and Hart.

It’s small, but something that anyone who loved Buffy and Angel will get a kick out of.

Source: Collider