The Arrowverse missed the chance to crossover Legends of Tomorrow and Supergirl. 1 / 7
DEO was destroyed by aliens... 2 / 7
And Alex Danvers could have informed the Legends of this through a video chat. 3 / 7
The Legends haven't been in contact with Supergirl's characters since Crisis... 4 / 7
And the COVID-19 pandemic has created production challenges. 5 / 7
The Arrowverse could have crossed the two shows over like this... 6 / 7
But sadly, it was a missed opportunity. 7 / 7