Board Thread:Fun and Games/@comment-27996636-20170814181056/@comment-31063493-20170819010100

And Beerus was cool about it. Meaning he wasn't scared. Meaning it can't be Jiren because if it was, Beerus would be fearing for his life as Powerful Mortal > a random GoD > Beerus > Goku and Vegeta.

If Jiren was the powerful mortal then Beerus would be scared because Universe 7 would be erased as Beerus would doubt Goku and Vegeta could beat someone stronger than Beerus.