It is mostly common knowledge that Barry Allen has never been called by `The Flash' in BvS. However, when Bruce Wayne explores the META_HUMAN files of Lex Luthor, he comes across videos of these four superheroes. And everyone has been given some kind of name as well as logo. The logos can be understood because, well, that's what they wear on their costumes. But their names are written on the files,
- Wonder Woman has Subject 1920/213_meta_human_alpha_WW
- Cyborg has Subject 1920/213_meta_human_alpha_CY
- Flash has Subject 1920/213_meta_human_alpha_FL, and
- Aquaman has Subject 1920/213_meta_human_alpha_AQ.
How does one explain this? Moreover, the Crisis on Infinite Earths from the Arrowverse made the Ezra Miller cameo on the premise that Miller's Flash has never thought of a name in the Snyderverse/DCEU. This is all contradicting. Maybe some kind of explanation can be found here?
I suppose the superheroes already have had their names established before, which Lex Luthor had known from his detective work. But this small point was missed by Arrowverse-Crisis? I am not sure how an explanation can be brought about here.