Avengers Cast Reads Thanos Book For Storytime!

I am behind on my Marvel movies.. I haven't seen Infinity War yet, so, some of this story was a surprise to me, so, SPOILER ALERT! Anyway, the Avengers: End Game cast was on Jimmy Kimmel Live! ahead of their 4/26 premiere.. and they read a lovely little bedtime story about their mortal enemy, Thanos!