User blog comment:MakeShift/Discussion on post-Crisis changes to the wiki/@comment-27750273-20200119080002/@comment-31722073-20200119234631

From the Supergirl trailer it seems like they don't remember their Earth-Prime history, Lena is shocked to discover Lex's survival (why J'onn would think bringing back her memories was a good idea is beyond me but here we are).