User blog comment:Vardion17/Supergirl is comming to The CW!/@comment-421074-20160512214521/@comment-3221148-20160513104826

A Forbes article teased the possibility of a Gotham/LOT crossover in the future, so we may end up seeing Gotham on Earth One yet. But for now, the connection is, unfortunately, unconfirmed, though Gotham was careful to use different versions of the villains they shared with Arrow (Dollmaker and Firefly).