Should 'Supergirl' Seek Superman's Assistance with the Worldkillers?

Much of Supergirl has been about establishing Kara Danvers as a hero in her own right, and as a hero the people of National City can count on. Before even introducing Superman as a recognizable character, we saw Kara fight to prove she didn't need her cousin to come save the day for her. It's safe to say Kara's proven to everyone she's just as capable, if not more so, than Superman. So would it be a mistake to bring in Superman to be at Kara's side during the Worldkiller fight?