IF they do cancel Supergirl, I hope that they will move her to the CW and somehow to the same earth as Barry and the Arrow and Legends of Tomorrow group. I don't recall that the Flash and Superman ,much less Supergirl were on parallel earths . They always existed on the same earth. Now Flash from 1940s Jay Garrick and the Flash from the 60s were on earth 2 and earth 1 respectively. Same for the 40s/60s version of Superman, Wonder Woman etc, etc. After the Crisis of Infinite Earths in 86, all the multi-verse was consolidated back into one earth with new origins for all super heroes on the now -same earth. Wonder if the Flash will deal with that in their show? AFter all the Flash died in the Crisis of Infinite Earths series and so did Supergirl ,trying to defend her cousin Superman from the Anti Monitor.