When "Crisis on Infinite Earths" comes the Arrowverse tomorrow, while the heroes will put up a fight there is bound to be some major losses. Teasers and trailers for the epic, five-part crossover event as well as the season premiere of Arrow have already given viewers a taste of some of those losses with Earth-2 being wiped out right before Oliver Queen's (Stephen Amell) horrified eyes. Teasers have also hinted at the destruction of the last living vestige of Krypton on Supergirl, Argo City and now in a new clip from tomorrow night's "Crisis on Infinite Earths Part 1" it looks like it's more than just Argo that Supergirl's lost. She's lost her mother as well.