But they could have made an episode without her. There are plenty episodes without the full squad. They could have made one about Babs and Harleen, the last episode ended with such a cliffhanger... I'm happy Supergirl will be back soon tho:)
Did they ever say who the new voice for Supergirl is gonna be? Personally, I think it should be either Megan Fahlenbock or Rachel Kimsey. They both have voiced tough, fighting babes in the past.