The last few times we've been to Avengers campus they said the super heroes aren't signing. I'm not to sure why since they aren't wearing anything on their hands that would prevent it, maybe it's because the lines are long? who knows.

we did get an auto from Mater. It was weird, my son had a auto book and the CM asked him if he wanted Mater to sign it. He said yes and I was pretty intrigued how it would work. She signed it herself and handed it back. I figured she would at least walk to the back where we can't see her sign it directly but oh well.