Felicity Smoak Fangirls Over Supergirl Hard in 'Heroes Vs Aliens' Extended Crossover Trailer

Felicity Smoak (Emily Bett Rickards) is all of us right now!

In the new extended trailer for the Heroes Vs Aliens crossover event between Arrow, The Flash, Supergirl and DC’s Legends of Tomorrow just debuted online.

In the vid, we get a closer look at the Dominators, who are wanting to take over Central City.

That sends Barry (Grant Gustin) over to Star City to recruit the Green Arrow (Stephen Amell) for help in stopping them, and to another universe entirely for Supergirl (Melissa Benoist).

The crossover event kicks off Monday, November 28th @ 8PM ET/PT on the CW.