Board Thread:Questions and Answers/@comment-11066282-20170420183646/@comment-18172179-20170420191040

We don't refer to Metallo as a New Earth character. He has his own Prime Earth page.

As for Reverse Flash.... it is such a good question and I'm afraid not even DC has a straight and definitive answer, as usual. The thing is, we could include any of them in the list. Who's to say one is the right over the other? We go with Prime Earth, because that is what would make sense the most... until DC says otherwise.