For those of you who want to TLDR, Here’s the text from James Gunn’s Tweet.

Krypto arrives on screens in Superman this summer. Krypto was inspired by our dog Ozu, who we adopted shortly after I started writing Superman. Ozu, who came from a hoarding situation in a backyard with 60 other dogs & never knew human beings, was problematic to say the least. He immediately came in & destroyed our home, our shoes, our furniture - he even ate my laptop. It took a long time before he would even let us touch him. I remember thinking, “Gosh, how difficult would life be if Ozu had superpowers?” - and thus Krypto came into the script & changed the shape of the story as Ozu was changing my life. What better time to debut the not-so-good-good-boy Krypto than #AdoptAShelterDog month. Btw, Ozu today, is, fairly often, a very good boy. #Superman

And here’s the image. It’s a video on the tweet, but it’s just the Earth revolving.