Repost from the DC board about Cavill's cameo in The Flash:
As I said long ago, DCEU Superman has also some Cavill-less cameos, he is on the news helping people during a natural disaster (faceless, you see him from the back), and Barry was a witness of Zod/Superman fighting in Metropolis back in 2013 (flashback scene), if I recall right Supes and Zod are supposed to appear as blurred silhouettes over there.
Repost from the Supergirl thread about a multiverse cameo in The Flash:
There is also a wtf? over the top cameo from another Superman that I'm sure it's going to break the internet in June. 😅🤐